Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized Double Blind Comparison of Atosiban in Patients With Repeated Implantation Failure Undergoing IVF Treatment
Brief Summary: This study intends to carry out a prospective, randomized, double blind and controlled study to compare the influence of Atosiban and placebo on uterine contraction frequency, endometrial blood flow perfusion, oxytocin and serum concentration of PGF2α, embryo implantation rate and clinical pregnancy rate on the RIF population after fresh embryo transfer, so as to further clarify the curative effect of Atosiban in the treatment of RIF and provide evidence-based basis for Atosiban for application in RIF population.


Options:
A: Inclusion Criteria:

* History of one previous cancelled cycle for high-risk of OHSS, or history of moderate/severe OHSS during their previous IVF cycle
* Infertility
* Polycystic ovary syndrome (PCOS)
* insulin resistance
* hyperandrogenism

Exclusion Criteria:

* BMI\>30 kg/m2
* age \>35 years
* FSH\>9UI/L
B: Inclusion Criteria:

* Fulfilling Rotterdam criteria for PCOS
* Infertility more than 1 year
* First or second cycle of IVF/ICSI treatment
* Age below 38 years at inclusion
* BMI below 28 kg/m3 at inclusion
* Willing to be randomised to 4 months metformin or placebo
* Signed written informed consent

Exclusion Criteria:

* Not suitable for starting dose 112.5 IE
* Basal FSH above 10 IU/L
* Known renal disease or s-creatinine above 110 umol/L
* Known liver disease or s-ALAT above 80 IU/L
* Known alcoholism or drug abuse
* Known diabetes mellitus or fasting plasma glucose above 7 mmol/L
* Corticosteroid treatment (oral)
* Treatment with cimetidine, anticoagulants, erythromycin or other macrolides
* Hyperprolactinemia (PRL above 700 mIU/L)
* Abnormal thyroid function tests
* Known congenital adrenal hyperplasia
* Androgen secreting tumours
* Cushing syndrome
* Metformin treatment within the last one month prior to screening
* Unfit to participate for any other reason
C: Inclusion Criteria:

1. 3 or more than 3 embryo implantation failure histories previously (or the number of high-quality embryos transplanted is \>4);
2. Age \<40 years；
3. Ultrasound or HSG showed normal uterine cavity, endometrium on transplantation day is ≥ 8mm;
4. There's at least one good quality embryo on transplantation day.

Exclusion Criteria:

1. Patients using donor sperm or donor eggs;
2. Patients have obvious uterine cavity abnormalities;
3. There was a clear hydrosalpinx;
4. Natural cycles or IVM patients;
5. Patients who cancel the due to the transfer due to various reasons, such as the failure of fertilization, or ovarian transitional stimulus syndrome (OHSS);
6. Abnormal karyotype;
7. Blastocyst transplantation patients.
D: Inclusion Criteria:

* Infertile women applied to assisted reproduction clinic
* Follicle stimulating hormone \< 12
* Body mass index \< 25
* Patients whom antagonist protocol will be used
* Patients whom at least 2 good-quality embryos obtained
* Patients who are volunteer

Exclusion Criteria:

* Severe male factor (Sperm concentration \<5 M/ml, progressive sperm motility \<%10)
* Uterine anomaly
* Hydrosalphynx
* Difficult embryo transfer
* Patients who previously had a diagnosis of endometriosis and / or adenomyosis
* Endocrine problems (hypothyroidism, hyperthyroidism, hyperprolactinemia, premature ovarian insufficiency)
* Having more than 3 in vitro fertilization failure
* Refusing to participate

Answer: C