Human chorionic gonadotropin - wikipedia Human chorionic gonadotropin Chorionic gonadotropin, alpha polypeptide Identifiers Symbol CGA Alt. symbols FSHA, GPHa, GPHA1, HCG, LHA, TSHA Entrez 1081 HUGO 1885 OMIM 118850 RefSeq NM_000735 UniProt P01215 Other data Locus Chr. 6 q14 - q21 chorionic gonadotropin, beta polypeptide Identifiers Symbol CGB Alt. symbols CGB3 Entrez 1082 HUGO 1886 OMIM 118860 RefSeq NM_000737 UniProt P01233 Other data Locus Chr. 19 q13. 3 Human chorionic gonadotropin ( hCG ) is a hormone produced by the placenta after implantation. The presence of hCG is detected in some pregnancy tests ( HCG pregnancy strip tests ). Some cancerous tumors produce this hormone ; therefore, elevated levels measured when the patient is not pregnant may lead to a cancer diagnosis and, if high enough, paraneoplastic syndromes, however, it is not known whether this production is a contributing cause, or an effect of carcinogenesis. The pituitary analog of hCG, known as luteinizing hormone ( LH ), is produced in the pituitary gland of males and females of all ages. Regarding endogenous forms of hCG, there are various ways to categorize and measure them, including total hCG, C - terminal peptide total hCG, intact hCG, free β - subunit hCG, β - core fragment hCG, hyperglycosylated hCG, nicked hCG, alpha hCG, and pituitary hCG. Regarding pharmaceutical preparations of hCG from animal or synthetic sources, there are many gonadotropin preparations, some of which are medically justified and others of which are of a quack nature. As of December 6, 2011, the United States Food and Drug Administration has prohibited the sale of `` homeopathic '' and over-the - counter hCG diet products and declared them fraudulent and illegal. Contents 1 Structure 2 Function 3 Production 4 hCG forms 5 Testing 5.1 Methodology 5.2 Reference levels in normal pregnancy 5.3 Interpretation 6 Uses 6.1 Tumor marker 6.2 Fertility 6.2. 1 HCG Pubergen, Pregnyl warnings 6.3 Anabolic steroid adjunct 6.4 HCG diet 6.4. 1 Homeopathic HCG for weight control 7 Tetanus vaccine controversy 8 See also 9 References 10 External links Structure Human chorionic gonadotropin is a glycoprotein composed of 237 amino acids with a molecular mass of 36.7 kDa, approximately 14.5 αhCG and 22.2 kDa βhCG. It is heterodimeric, with an α ( alpha ) subunit identical to that of luteinizing hormone ( LH ), follicle - stimulating hormone ( FSH ), thyroid - stimulating hormone ( TSH ), and β ( beta ) subunit that is unique to hCG. The α ( alpha ) subunit is 92 amino acids long. The β - subunit of hCG gonadotropin ( beta - hCG ) contains 145 amino acids, encoded by six highly homologous genes that are arranged in tandem and inverted pairs on chromosome 19q 13.3 - CGB ( 1, 2, 3, 5, 7, 8 ) The two subunits create a small hydrophobic core surrounded by a high surface area - to - volume ratio : 2.8 times that of a sphere. The vast majority of the outer amino acids are hydrophilic. Function Human chorionic gonadotropin interacts with the LHCG receptor of the ovary and promotes the maintenance of the corpus luteum during the beginning of pregnancy. This allows the corpus luteum to secrete the hormone progesterone during the first trimester. Progesterone enriches the uterus with a thick lining of blood vessels and capillaries so that it can sustain the growing fetus. Due to its highly negative charge, hCG may repel the immune cells of the mother, protecting the fetus during the first trimester. It has also been hypothesized that hCG may be a placental link for the development of local maternal immunotolerance. For example, hCG - treated endometrial cells induce an increase in T cell apoptosis ( dissolution of T cells ). These results suggest that hCG may be a link in the development of peritrophoblastic immune tolerance, and may facilitate the trophoblast invasion, which is known to expedite fetal development in the endometrium. It has also been suggested that hCG levels are linked to the severity of morning sickness or Hyperemesis gravidarum in pregnant women. Because of its similarity to LH, hCG can also be used clinically to induce ovulation in the ovaries as well as testosterone production in the testes. As the most abundant biological source is women who are presently pregnant, some organizations collect urine from pregnant women to extract hCG for use in fertility treatment. Human chorionic gonadotropin also plays a role in cellular differentiation / proliferation and may activate apoptosis. Production Naturally, it is produced in the human placenta by the syncytiotrophoblast. Like any other gonadotropins, it can be extracted from the urine of pregnant women or produced from cultures of genetically modified cells using recombinant DNA technology. In Pubergen, Pregnyl, Follutein, Profasi, Choragon and Novarel, it is extracted from the urine of pregnant women. In Ovidrel, it is produced with recombinant DNA technology. HCG forms This section needs expansion. You can help by adding to it. ( August 2015 ) Regarding endogenous forms of hCG, there are various ways to categorize and measure them, including total hCG, C - terminal peptide total hCG, intact hCG, free β - subunit hCG, β - core fragment hCG, hyperglycosylated hCG, nicked hCG, alpha hCG, and pituitary hCG. Regular hCG is the main form of hCG associated with the majority of pregnancy and in non-invasive molar pregnancies. This is produced in the trophoblast cells of the placental tissue. Hyperglycosylated hCG is the main form of hCG during the implantation phase of pregnancy, with invasive molar pregnancies, and with choriocarcinoma. Regarding pharmaceutical preparations of hCG from animal or synthetic sources, there are many gonadotropin preparations, some of which are medically justified and others of which are of a quack nature. Testing Blood or urine tests measure hCG. These can be pregnancy tests. hCG - positive indicates an implanted blastocyst and mammalian embryogenesis. These can be done to diagnose and monitor germ cell tumors and gestational trophoblastic diseases. Concentrations are commonly reported in thousandth international units per milliliter ( mIU / ml ). The international unit of hCG was originally established in 1938 and has been redefined in 1964 and in 1980. At the present time, 1 international unit is equal to approximately 2.35 × 10 moles, or about 6 × 10 grams. Methodology Most tests employ a monoclonal antibody, which is specific to the β - subunit of hCG ( β - hCG ). This procedure is employed to ensure that tests do not make false positives by confusing hCG with LH and FSH. ( The latter two are always present at varying levels in the body, whereas the presence of hCG almost always indicates pregnancy. ) Many hCG immunoassays are based on the sandwich principle, which uses antibodies to hCG labeled with an enzyme or a conventional or luminescent dye. Pregnancy urine dipstick tests are based on the lateral flow technique. The urine test may be a chromatographic immunoassay or any of several other test formats, home -, physician 's office -, or laboratory - based. Published detection thresholds range from 20 to 100 mIU / ml, depending on the brand of test. Early in pregnancy, more accurate results may be obtained by using the first urine of the morning ( when urine is most concentrated ). When the urine is dilute ( specific gravity less than 1.015 ), the hCG concentration may not be representative of the blood concentration, and the test may be falsely negative. The serum test, using 2 - 4 mL of venous blood, is typically a chemiluminescent or fluorimetric immunoassay that can detect βhCG levels as low as 5 mIU / ml and allows quantification of the βhCG concentration. Reference levels in normal pregnancy The following is a list of serum hCG levels. ( LMP is the last menstrual period dated from the first day of the last menstrual period. ) The levels grow exponentially after conception and implantation. weeks since LMP mIU / mL 5 -- 50 5 -- 428 5 18 -- 7,340 6 1,080 -- 56,500 7 -- 8 7,650 -- 229,000 9 -- 12 25,700 -- 288,000 13 -- 16 13,300 -- 254,000 17 -- 24 4,060 -- 165,400 25 -- 40 3,640 -- 117,000 Non-pregnant females < 5.0 Postmenopausal females < 9.5 Interpretation The ability to quantitate the βhCG level is useful in the monitoring germ cell and trophoblastic tumors, follow - up care after miscarriage, and in diagnosis of and follow - up care after treatment of ectopic pregnancy. The lack of a visible fetus on vaginal ultrasound after the βhCG levels have reached 1500 mIU / ml is strongly indicative of an ectopic pregnancy. Still, even an hCG over 2000 IU / l does not necessarily exclude the presence of a viable intrauterine pregnancy in such cases. As pregnancy tests, quantitative blood tests and the most sensitive urine tests usually detect hCG between 6 and 12 days after ovulation. It must be taken into account, however, that total hCG levels may vary in a very wide range within the first 4 weeks of gestation, leading to false results during this period. A rise of 35 % over 48 hours is proposed as the minimal rise consistent with a viable intrauterine pregnancy. Gestational trophoblastic disease like hydatidiform moles ( `` molar pregnancy '' ) or choriocarcinoma may produce high levels of βhCG ( due to the presence of syncytialtrophoblasts - part of the villi that make up the placenta ) despite the absence of an embryo. This, as well as several other conditions, can lead to elevated hCG readings in the absence of pregnancy. hCG levels are also a component of the triple test, a screening test for certain fetal chromosomal abnormalities / birth defects. A study of 32 normal pregnancies came to the result a gestational sac of 1 -- 3 mm was detected at a mean hCG level of 1150 IU / l ( range 800 - 1500 ), a yolk sac was detected at a mean level of 6000 IU / l ( range 4500 - 7500 ) and fetal heartbeat was visible at a mean hCG level of 10,000 IU / l ( range 8650 - 12,200 ). Uses Tumor marker Human chorionic gonadotropin can be used as a tumor marker, as its β subunit is secreted by some cancers including seminoma, choriocarcinoma, germ cell tumors, hydatidiform mole, teratoma with elements of choriocarcinoma, and islet cell tumor. For this reason, a positive result in males can be a test for testicular cancer. The normal range for men is between 0 - 5 mIU / mL. Combined with alpha - fetoprotein, β - HCG is an excellent tumor marker for the monitoring of germ cell tumors. Fertility Human chorionic gonadotropin Clinical data Trade names Novarel, Pregnyl AHFS / Drugs.com Monograph ATC code G03GA08 ( WHO ) Identifiers CAS Number 9002 - 61 - 3 DrugBank DB00097 ChemSpider none ECHA InfoCard 100.029. 679 Chemical and physical data Formula Molar mass 25719.70 ( what is this ? ) Human chorionic gonadotropin injection is extensively used for final maturation induction in lieu of luteinizing hormone. In the presence of one or more mature ovarian follicles, ovulation can be triggered by the administration of HCG. As ovulation will happen between 38 and 40 hours after a single HCG injection, procedures can be scheduled to take advantage of this time sequence, such as intrauterine insemination or sexual intercourse. Also, patients that undergo IVF, in general, receive HCG to trigger the ovulation process, but have an oocyte retrieval performed at about 34 to 36 hours after injection by, a few hours before the eggs actually would be released from the ovary. As HCG supports the corpus luteum, administration of HCG is used in certain circumstances to enhance the production of progesterone. In the male, HCG injections are used to stimulate the Leydig cells to synthesize testosterone. The intratesticular testosterone is necessary for spermatogenesis from the sertoli cells. Typical uses for HCG in men include hypogonadism and fertility treatment. Several vaccines against human chorionic gonadotropin ( hCG ) for the prevention of pregnancy are currently in clinical trials. HCG Pubergen, Pregnyl warnings In the case of female patients who want to be treated with HCG Pubergen, Pregnyl : a ) Since infertile female patients who undergo medically assisted reproduction ( especially those who need in vitro fertilization ), are known to often be suffering from tubal abnormalities, after a treatment with this drug they might experience many more ectopic pregnancies. This is why early ultrasound confirmation at the beginning of a pregnancy ( to see whether the pregnancy is intrauterine or not ) is crucial. Pregnancies that have occurred after a treatment with this medicine are submitted to a higher risk of multiplets. Female patients who have thrombosis, severe obesity, or thrombophilia should not be prescribed this medicine as they have a higher risk of arterial or venous thromboembolic events after or during a treatment with HCG Pubergen, Pregnyl. b ) Female patients who have been treated with this medicine are usually more prone to pregnancy losses. In the case of male patients : A prolonged treatment with HCG Pubergen, Pregnyl is known to regularly lead to increased production of androgen. Therefore : Patients who are suffering from overt or latent cardiac failure, hypertension, renal dysfunction, migraines, or epilepsy might not be allowed to start using this medicine or may require a lower dose of HCG Pubergen, Pregnyl. Also this medicine should be used with extreme caution in the treatment of prepubescent teenagers in order to reduce the risk of precocious sexual development or premature epiphyseal closure. This type of patients ' skeletal maturation should be closely and regularly monitored. Both male and female patients who have the following medical conditions must not start a treatment with HCG Pubergen, Pregnyl : ( 1 ) Hypersensitivity to this medicine or to any of its main ingredients. ( 2 ) Known or possible androgen - dependent tumors for example male breast carcinoma or prostatic carcinoma. Anabolic steroid adjunct In the world of performance - enhancing drugs, HCG is increasingly used in combination with various anabolic - androgenic steroid ( AAS ) cycles. As a result, HCG is included in some sports ' illegal drug lists. When exogenous AAS are put into the male body, natural negative - feedback loops cause the body to shut down its own production of testosterone via shutdown of the hypothalamic - pituitary - gonadal axis ( HPGA ). This causes testicular atrophy, among other things. HCG is commonly used during and after steroid cycles to maintain and restore testicular size as well as normal testosterone production. High levels of AASs, that mimic the body 's natural testosterone, trigger the hypothalamus to shut down its production of gonadotropin - releasing hormone ( GnRH ) from the hypothalamus. Without GnRH, the pituitary gland stops releasing luteinizing hormone ( LH ). LH normally travels from the pituitary via the blood stream to the testes, where it triggers the production and release of testosterone. Without LH, the testes shut down their production of testosterone. In males, HCG helps restore and maintain testosterone production in the testes by mimicking LH and triggering the production and release of testosterone. If HCG is used for too long and in too high a dose, the resulting rise in natural testosterone and estrogen would eventually inhibit endogenous production of luteinizing hormone via negative feedback on the hypothalamus and pituitary gland. Professional athletes who have tested positive for HCG have been temporarily banned from their sport, including a 50 - game ban from MLB for Manny Ramirez in 2009 and a 4 - game ban from the NFL for Brian Cushing for a positive urine test for HCG. Mixed Martial Arts fighter Dennis Siver was fined $19,800 and suspended 9 months for being tested positive after his bout at UFC 168. HCG diet British endocrinologist Albert T.W. Simeons proposed HCG as an adjunct to an ultra-low - calorie weight - loss diet ( fewer than 500 calories ). Simeons, while studying pregnant women in India on a calorie - deficient diet, and `` fat boys '' with pituitary problems ( Frölich 's syndrome ) treated with low - dose HCG, observed that both lost fat rather than lean ( muscle ) tissue. He reasoned that HCG must be programming the hypothalamus to do this in the former cases in order to protect the developing fetus by promoting mobilization and consumption of abnormal, excessive adipose deposits. Simeons in 1954 published a book entitled Pounds and Inches, designed to combat obesity. Simeons, practicing at Salvator Mundi International Hospital in Rome, Italy, recommended low - dose daily HCG injections ( 125 IU ) in combination with a customized ultra-low - calorie ( 500 cal / day, high - protein, low - carbohydrate / fat ) diet, which was supposed to result in a loss of adipose tissue without loss of lean tissue. Other researchers did not find the same results when attempting experiments to confirm Simeons ' conclusions, and in 1976 in response to complaints the FDA required Simeons and others to include the following disclaimer on all advertisements : These weight reduction treatments include the injection of HCG, a drug which has not been approved by the Food and Drug Administration as safe and effective in the treatment of obesity or weight control. There is no substantial evidence that HCG increases weight loss beyond that resulting from caloric restriction, that it causes a more attractive or `` normal '' distribution of fat, or that it decreases the hunger and discomfort associated with calorie - restrictive diets. -- 1976 FDA - mandated disclaimer for HCG diet advertisements There was a resurgence of interest in the `` HCG diet '' following promotion by Kevin Trudeau, who was banned from making HCG diet weight - loss claims by the U.S. Federal Trade Commission in 2008, and eventually jailed over such claims. A 1976 study in the American Journal of Clinical Nutrition concluded that HCG is not more effective as a weight - loss aid than dietary restriction alone. A 1995 meta analysis found that studies supporting HCG for weight loss were of poor methodological quality and concluded that `` there is no scientific evidence that HCG is effective in the treatment of obesity ; it does not bring about weight - loss or fat - redistribution, nor does it reduce hunger or induce a feeling of well - being ''. On November 15, 2016, the American Medical Association ( AMA ) passed policy that `` The use of human chorionic gonadotropin ( HCG ) for weight loss is inappropriate. '' There is no scientific evidence that HCG is effective in the treatment of obesity. The meta - analysis found insufficient evidence supporting the claims that HCG is effective in altering fat - distribution, hunger reduction, or in inducing a feeling of well - being. The authors stated ``... the use of HCG should be regarded as an inappropriate therapy for weight reduction... '' In the authors opinion, `` Pharmacists and physicians should be alert on the use of HCG for Simeons therapy. The results of this meta - analysis support a firm standpoint against this improper indication. Restraints on physicians practicing this therapy can be based on our findings. '' -- American Society of Bariatric Physicians ' commentary on Lijesen et. al ( 1995 ) According to the American Society of Bariatric Physicians, no new clinical trials have been published since the definitive 1995 meta - analysis. The scientific consensus is that any weight loss reported by individuals on an `` HCG diet '' may be attributed entirely to the fact that such diets prescribe calorie intake of between 500 and 1,000 calories per day, substantially below recommended levels for an adult, to the point that this may risk health effects associated with malnutrition. Homeopathic hCG for weight control Controversy about, and shortages of, injected HCG for weight loss have led to substantial Internet promotion of `` homeopathic HCG '' for weight control. The ingredients in these products are often obscure, but if prepared from true HCG via homeopathic dilution, they contain either no HCG at all or only trace amounts. Moreover, it is highly unlikely that oral HCG is bioavailable due to the fact that digestive protease enzymes and hepatic metabolism renders peptide - based molecules ( such as insulin and human growth hormone ) biologically inert. HCG can likely only enter the bloodstream through injection. The United States Food and Drug Administration has stated that over-the - counter products containing HCG are fraudulent and ineffective for weight loss. They are also not protected as homeopathic drugs and have been deemed illegal substances. HCG is classified as a prescription drug in the United States and it has not been approved for over-the - counter sales by the FDA as a weight loss product or for any other purposes, and therefore neither HCG in its pure form nor any preparations containing HCG may be sold legally in the country except by prescription. In December 2011, FDA and FTC started to take actions to pull unapproved HCG products from the market. In the aftermath, some suppliers started to switch to `` hormone - free '' versions of their weight loss products, where the hormone is replaced with an unproven mixture of free amino acids or where radionics is used to transfer the `` energy '' to the final product. Tetanus vaccine controversy In order to induce a stronger immune response, some versions of human chorionic gonadotropin - based anti-fertility vaccines were designed as conjugates of the β subunit of HCG covalently linked to tetanus toxoid. It has been alleged that a non-conjugated tetanus vaccine used in developing countries is laced with a human chorionic gonadotropin based anti-fertility drug and is distributed as a means of mass sterilization. This charge has been vigorously denied by the World Health Organization ( WHO ) and UNICEF. Others have argued that a hCG laced vaccine could not be used for sterilization since the effects of the anti-fertility vaccines are reversible ( requiring booster doses to maintain immunity ) and a non-conjugated vaccine is likely to be ineffective. Finally, independent testing of the tetanus vaccine by Kenya 's health authorities has revealed no traces of the human chorionic gonadotropin hormone. 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Jump up ^ Phillips J ( 2011 - 01 - 24 ). `` Weight Loss Drugs Dubbed Fraudulent and Illegal by FDA ''. Epoch Times. Archived from the original on 2011 - 01 - 28. Retrieved 2011 - 02 - 03. Jump up ^ Hellmich N ( 2011 - 01 - 23 ). `` HCG weight - loss products are fraudulent, FDA says - USATODAY.com ''. USA Today. Retrieved 2011 - 02 - 03. Jump up ^ `` Hormone - Free HCG Drops are Quickly Replacing Homeopathic Counterparts ''. San Francisco Chronicle. March 9, 2012. Jump up ^ Talwar GP ( 1997 ). `` Fertility regulating and immunotherapeutic vaccines reaching human trials stage '' ( PDF ). Human Reproduction Update. 3 ( 4 ) : 301 -- 10. doi : 10.1093 / humupd / 3.4. 301. PMID 9459276. Jump up ^ `` Tetanus vaccine may be laced with anti-fertility drug. International / developing countries ''. Vaccine Weekly : 9 -- 10. 1995. PMID 12346214. Jump up ^ Weatherbe S ( 12 November 2014 ). `` Kenyan gvmt launches probe into claim UN is using vaccines for ' mass sterilization ' ''. 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External links Chorionic + Gonadotropin at the US National Library of Medicine Medical Subject Headings ( MeSH ) History of pregnancy test ( NIH ) PDB gallery 1hcn : STRUCTURE OF HUMAN CHORIONIC GONADOTROPIN AT 2.6 ANGSTROMS RESOLUTION FROM MAD ANALYSIS OF THE SELENOMETHIONYL PROTEIN 1hrp : CRYSTAL STRUCTURE OF HUMAN CHORIONIC GONADOTROPIN 1qfw : TERNARY COMPLEX OF HUMAN CHORIONIC GONADOTROPIN WITH FV ANTI ALPHA SUBUNIT AND FV ANTI BETA SUBUNIT GnRH and gonadotropins GnRH modulators ( incl. analogues ) Agonists Peptide : Azagly - nafarelin Buserelin Deslorelin Fertirelin Gonadorelin Goserelin Histrelin Lecirelin Leuprorelin ( leuprolide ) Nafarelin Peforelin Triptorelin Antagonists Peptide : Abarelix Cetrorelix Degarelix Ganirelix Non-peptide : Elagolix Linzagolix Relugolix Gonadotropins Preparations Follicle - stimulating hormone Human chorionic gonadotropin Luteinizing hormone Menotropin Urofollitropin Others ( indirect ) Progonadotropins Sex steroid antagonists ( via disinhibition of the HPG axis ) : Antiandrogens ( e.g., flutamide, bicalutamide, enzalutamide ) Antiestrogens / SERMs ( e.g., tamoxifen, clomifene, enclomifene ) Aromatase inhibitors ( e.g., anastrozole ) GnRH agonists ( e.g., GnRH ) Antigonadotropins Sex steroid agonists ( via negative feedback on the HPG axis ) : Androgens / anabolic steroids ( e.g., testosterone, nandrolone esters, oxandrolone ) D receptor antagonists ( prolactin releasers ) ( incl., domperidone, metoclopramide, risperidone, haloperidol, chlorpromazine, sulpiride ) Estrogens ( incl., bifluranol, estradiol, estradiol esters, ethinylestradiol, diethylstilbestrol, paroxypropione ) Progestogens ( incl. progestins, e.g., chlormadinone acetate, cyproterone acetate, hydroxyprogesterone caproate, gestonorone caproate, medroxyprogesterone acetate, megestrol acetate ) Others ( mixed or unknown mechanism of action ) : Danazol Gestrinone Metallibure WHO - EM Withdrawn from market Clinical trials : Phase III Never to phase III See also GnRH and gonadotropin receptor modulators Androgens and antiandrogens Estrogens and antiestrogens Progestogens and antiprogestogens Assisted reproductive technology Infertility Female Male Fertility clinic Fertility testing Fertility tourism Fertility medication Estrogen antagonists aromatase inhibitor clomifene FSH GnRH agonists Gonadotropins menotropins hCG In vitro fertilisation ( IVF ) and expansions Assisted zona hatching Autologous endometrial coculture Cytoplasmic transfer Embryo transfer Gestational carrier In vitro maturation Intracytoplasmic sperm injection Oocyte selection Ovarian hyperstimulation Preimplantation genetic diagnosis Snowflake children Transvaginal ovum retrieval Zygote intrafallopian transfer Other methods Artificial insemination sperm donation Cryopreservation embryos oocyte ovarian tissue semen Gamete intrafallopian transfer Reproductive surgery vasectomy reversal Semen collection Sex selection Surrogacy Donation Donor registration Donor Sibling Registry Egg donation Embryo Sperm Sperm bank Ova bank Ethics Accidental incest Genetic diagnosis of intersex Religious response to ART Mitochondrial donation Sex selection In fiction See subsection in sperm donation Reproduction and pregnancy in speculative fiction Hormones Endocrine glands Hypothalamic - pituitary Hypothalamus GnRH TRH Dopamine CRH GHRH Somatostatin ( GHIH ) MCH Posterior pituitary Oxytocin Vasopressin Anterior pituitary FSH LH TSH Prolactin POMC CLIP ACTH MSH Endorphins Lipotropin GH Adrenal axis Adrenal cortex Aldosterone Cortisol Cortisone DHEA DHEA - S Androstenedione Adrenal medulla Epinephrine Norepinephrine Thyroid Thyroid hormones Calcitonin Thyroid axis Parathyroid PTH Gonadal axis Testis Testosterone AMH Inhibin Ovary Estradiol Progesterone Activin Inhibin Relaxin GnSAF Placenta hCG HPL Estrogen Progesterone Pancreas Glucagon Insulin Amylin Somatostatin Pancreatic polypeptide Pineal gland Melatonin N, N - Dimethyltryptamine 5 - Methoxy - N, N - dimethyltryptamine Other Thymus Thymosins Thymosin α1 Beta thymosins Thymopoietin Thymulin Digestive system Stomach Gastrin Ghrelin Duodenum CCK Incretins GIP GLP - 1 Secretin Motilin VIP Ileum Enteroglucagon Peptide YY Liver / other Insulin - like growth factor IGF - 1 IGF - 2 Adipose tissue Leptin Adiponectin Resistin Skeleton Osteocalcin Kidney Renin EPO Calcitriol Prostaglandin Heart Natriuretic peptide ANP BNP GnRH and gonadotropin receptor modulators GnRH Agonists : Peptides : Alarelin Avorelin Azagly - nafarelin Buserelin Deslorelin Fertirelin GnRH Gonadorelin Goserelin Histrelin Leuprorelin ( leuprolide ) Lutrelin Nafarelin Peforelin Salmon GnRH Triptorelin Zoptarelin Zoptarelin doxorubicin Antagonists : Peptides : Abarelix Acyline Azaline B Cetrorelix Degarelix Detirelix Ganirelix Iturelix ( antide ) LXT - 101 Ornirelix ( ornitide ) Ozarelix Prazarelix Ramorelix Teverelix ( antarelix ) ; Non-peptides : Elagolix Linzagolix Opigolix Relugolix Sufugolix Gonadotropin LH / hCG Agonists : Peptides : Choriogonadotropin alfa Human chorionic gonadotropin Luteinizing hormone Lutropin alfa Menotropin ( human menopausal gonadotropin ) FSH Agonists : Peptides : Corifollitropin alfa Follicle - stimulating hormone Follitropin alfa Follitropin beta Follitropin epsilon Menotropin ( human menopausal gonadotropin ) Urofollitropin Varfollitropin alfa NAMs : Non-peptides : ADX - 61623 See also : Receptor / signaling modulators Signaling peptide / protein receptor modulators GnRH and gonadotropins Retrieved from `` https://en.wikipedia.org/w/index.php?title=Human_chorionic_gonadotropin&oldid=849256466 '' Categories : Genes on human chromosome 6 Genes on human chromosome 19 Glycoproteins Peptide hormones Gonadotropin - releasing hormone and gonadotropins Hormones of the hypothalamus - pituitary - gonad axis Sex hormones Hormones of the placenta Hormones of the pregnant female Chemical pathology Tumor markers Anti-aging substances Tests for pregnancy Human female endocrine system Hidden categories : All articles lacking reliable references Articles lacking reliable references from December 2011 Wikipedia articles needing page number citations from December 2011 CS1 Italian - language sources ( it ) Protein pages needing a picture Articles containing potentially dated statements from December 2011 All articles containing potentially dated statements All articles with unsourced statements Articles with unsourced statements from March 2015 Articles to be expanded from August 2015 All articles to be expanded Articles using small message boxes Articles with unsourced statements from February 2013 Template : drugs.com link with non-standard subpage Articles with changed DrugBank identifier Chemicals that do not have a ChemSpider ID assigned ECHA InfoCard ID from Wikidata Infobox drug articles without a structure image Articles without EBI source Articles without KEGG source Articles without InChI source Articles without UNII source Drugs with no legal status Drugboxes which contain changes to verified fields Articles containing unverified chemical infoboxes Talk Contents About Wikipedia تۆرکجه Български Català Čeština Dansk Deutsch ދިވެހިބަސް Español فارسی Français Galego 한국어 Bahasa Indonesia Italiano עברית Lietuvių Nederlands 日本 語 Norsk Polski Português Русский Simple English کوردی Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska தமிழ் Türkçe Українська 中文 24 more Edit links This page was last edited on 7 July 2018, at 17 : 52 ( UTC ). 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Question: where is human chorionic gonadotropin (hcg) produced
Answer: the placenta