Title: Ovulation
Content:  Estrogen levels peak towards the end of the follicular phase, around 12 and 24 hours. This, by positive feedback, causes a surge in levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). This lasts from 24 to 36 hours, and results in the rupture of the ovarian follicles, causing the oocyte to be released from the ovary. Through a signal transduction cascade initiated by LH, which activates the pro-inflammatory genes through cAMP secondary messenger, proteolytic enzymes are secreted by the follicle that degrade the follicular tissue at the site of the blister, forming a hole called the stigma. The secondary oocyte leaves the ruptured follicle and moves out into the peritoneal cavity through the stigma, where it is caught by the fimbriae at the end of 
Title: Folliculogenesis
Content:  tubes to eventually be discharged through menstruation in the case that it is unfertilized or if it is not successfully implanted in the uterus (if previously fertilized). The ruptured follicle will undergo a dramatic transformation into the corpus luteum, a steroidiogenic cluster of cells that maintains the endometrium of the uterus by the secretion of large amounts of progesterone and minor amounts of estrogen. These two steps, while not part of folliculogenesis, are included for completeness. They are discussed in their entirety by their respective articles, and placed into perspective by the menstrual cycle article. It is recommended that these three topics be reviewed.
Title: Corpus luteum
Content:  The corpus luteum (Latin for "yellow body"; plural corpora lutea) is a temporary endocrine structure in female ovaries and is involved in the production of relatively high levels of progesterone and moderate levels of estradiol and inhibin A. It is the remains of the ovarian follicle that has released a mature ovum during a previous ovulation. The corpus luteum is colored as a result of concentrating carotenoids (including lutein) from the diet and secretes a moderate amount of estrogen that inhibits further release of gonadotropin-releasing hormone (GnRH) and thus secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). A new corpus luteum develops with each menstrual cycle.
Title: Corpus luteum
Content:  If the egg is fertilized and implantation occurs, the syncytiotrophoblast (derived from trophoblast) cells of the blastocyst secrete the hormone human chorionic gonadotropin (hCG, or a similar hormone in other species) by day 9 post-fertilization. Human chorionic gonadotropin signals the corpus luteum to continue progesterone secretion, thereby maintaining the thick lining (endometrium) of the uterus and providing an area rich in blood vessels in which the zygote(s) can develop. From this point on, the corpus luteum is called the corpus luteum graviditatis. The introduction of prostaglandins at this point causes the degeneration of the corpus luteum and the abortion of the fetus. However, in placental animals such as humans, the placenta eventually takes over progesterone production and the corpus luteum degrades into a corpus albicans without embryo/fetus loss. Luteal support refers to the administration of medication (generally progestins) for the purpose of increasing the success of implantation and early embryogenesis, thereby complementing the function of the corpus luteum.
Title: Ovulation
Content:  The follicle proper has met the end of its lifespan. Without the oocyte, the follicle folds inward on itself, transforming into the corpus luteum (pl. corpora lutea), a steroidogenic cluster of cells that produces estrogen and progesterone. These hormones induce the endometrial glands to begin production of the proliferative endometrium and later  into secretory endometrium, the site of embryonic growth if  implantation occurs. The action of progesterone increases basal body temperature by one-quarter to one-half degree Celsius (one-half  to one degree Fahrenheit). The corpus luteum continues this paracrine action for the remainder of the menstrual cycle, maintaining the  endometrium, before disintegrating into scar tissue during menses.
Title: Human body
Content:  estrogen and progesterone levels the hypothalamus releases gonadotropin releasing hormone (GnRH). This causes the anterior pituitary gland to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH). FSH stimulates ovarian follicles to grow and one dominant follicle will eventually take over. As it continues to grow it releases more and more estradiol which stimulates LH secretion and suppresses FSH secretion preventing further follicular growth. When LH levels are highest the follicle ruptures releasing the ovum in a process called ovulation where it is then moved to one of the fallopian tubes. After ovulation the portion of the follicle that remains in the ovary is 
Title: Luteal phase
Content:  After ovulation and release of the oocyte, the anterior pituitary hormones–FSH and LH are released and cause the remaining parts of the dominant follicle to transform into the corpus luteum. It continues to grow during the luteal phase after ovulation and produces significant amounts of hormones, particularly progesterone, and, to a lesser extent, estrogen and inhibin. Progesterone plays a vital role in making the endometrium receptive to implantation of the blastocyst and supportive of early pregnancy. The increase in estrogen and progesterone also lead to increased basal body temperature during the luteal phase. The LH surge that occurs during ovulation triggers the release of the oocyte and its cumulus oophorus from the ovary and into the fallopian tube and triggers the oocyte to 
Title: Corpus luteum
Content:  The corpus luteum develops from an ovarian follicle during the luteal phase of the menstrual cycle or oestrous cycle, following the release of a secondary oocyte from the follicle during ovulation. The follicle first forms a corpus hemorrhagicum before it becomes a corpus luteum, but the term refers to the visible collection of blood, left after rupture of the follicle, that secretes progesterone. While the oocyte (later the zygote if fertilization occurs) traverses the Fallopian tube into the uterus, the corpus luteum remains in the ovary. The corpus luteum is typically very large relative to the size of the ovary; in humans, the size of the structure ranges from under 2 cm to 5 cm in diameter. Its cells develop from 
Title: Corpus hemorrhagicum
Content:  The corpus hemorrhagicum ("bleeding corpus luteum") is a temporary structure formed immediately after ovulation from the ovarian follicle as it collapses and is filled with blood that quickly clots. After the trauma heals, the subsequent structure is called the corpus luteum (which in turn becomes the corpus albicans before degenerating). Sometimes during ovulation, small blood vessels rupture, and the cavity of the ruptured follicle fills with a blood clot, a corpus hemorrhagicum.
Title: Human body
Content:  into corpus luteum which continues to produce estrogen and high levels of progesterone. The progesterone causes the endometrium to grow thick preparing it for implantation of a fertilized egg. If fertilization occurs the corpus luteum continues to secrete hormones until the placenta develops enough to secrete the necessary hormones for maintaining pregnancy. Eventually the corpus luteum will turn into corpus albicans which is essentially scar tissue. If fertilization fails the corpus luteum will degrade into corpus albicans and stop secreting enough progesterone and estrogen causing the endometrial lining to break resulting in menstruation. Many diseases affect the reproductive system such as polycystic ovary 

Question: which hormone is released from the ruptured follicle or corpus luteum?
Answer: estrogen.
estradiol.
inhibin A.
progesterone.