Comparative analysis of the pregnancy rate via fertilization vs. previous artificial insemination in patients with unexplained infertility.

Objective: To compare the clinical pregnancy rate among patients undergoing direct in vitro fertilization vs. in vitro fertilization after two cycles of intrauterine insemination in couples with unexplained infertility.

Methods: Comparative cross-sectional, retrospective study from 2016 to 2019, from the Centro Mexicano de Fertilidad Doctor Alberto Kably.

[Assessment of progesterone levels on the day of the hCG administration as a predictor of success of antagonist stimulation protocols for IVF].

Background: There are reports of deleterious effect when progesterone concentration is high during the follicular phase in cycles of in vitro fertilization. In our environment has not carried out a study to evaluate the pregnancy rate compared with progesterone concentration on the day of application of hCG.

Objective: To evaluate the pregnancy rate and outcome of in vitro fertilization cycle according to serum progesterone concentration on the day of application of hCG.

[Effect of sexual abstinence on pregnancy rates after an intrauterine insemination].

Background: There are many studies showing that more days of sexual abstinence increased sperm concentration, however, the direct influence between the days of abstinence and pregnancy rates has not been evaluated. The usual recommendation is 3-4 days prior to intrauterine insemination; this based on the interval that maximizes the number of motile sperm in the ejaculate. There are some reports with better success rate when abstinence is less than three days.

[Prevalence of clinical and subclinical hypothyroidism during pregnancy in a pregnant women population].

Objectives: To determine the prevalence of hypothyroidism during pregnancy in a group of pregnant patients attending antenatal care at the National Institute of Perinatology and to meet cases not detected by universal screening.

Materials And Methods: Was conducted from October 2012 to March 2013, in a group of pregnant patients attending to National Institute of Perinatology, thyroid profile was performed according to the recom- mendations of the American Thyroid Association. Patients were referred to endocrinology consultation and treatment was started in case of abnormal thyroid profile.

[Unselective single embryo transfer: chances of pregnancy related to operator experience].

Background: Selection of best quality embryo aims to achieve higher success rate, the pregnancy is unique and therefore obstetric risks are reduced.

Objective: To evaluate the pregnancy rate with no transfer of selected single embryo (TSSE) three days versus the experience of the physician performing the embryo transfer.

Patients And Methods: A retrospective, cross-sectional observational study in 159 patients Mexican Fertility Center in CEPAM protocol in vitro fertilization any indication, other ovulatory disorders and who was only possible obtain an embryo to be transferred in three day.

[Future reproductive ability in post-treatment Asherman's syndrome patients].

Background: Hysteroscopy is the best approach for the management of Asherman syndrome with reproductive purposes, since it allows a quick diagnosis and treatment of partial or total uterine adhesions. However, there are a few studies on the reproductive outcome in patients with Asherman's syndrome.

Objective: Evaluate the results of adherenciolisis hysteroscopy in women with Asherman's syndrome.