[Influence of the high peak serum estradiol on the outcome of in vitro fertilization cycles].

Background: For the use of assisted reproductive technologies of high complexity (IVF-ET and ICSI) is essential to proper ovarian stimulation with recombinant FSH drugs menotropins, as well as the use of GnRH analogues.

Objective: To correlate serum estradiol level on day 10th with the outcome of in vitro fertilization cycles.

Material And Method: Retrospective study of 523 IVF cycles, selected and analyzed from 2005 to 2009.

[Intacytoplasmic sperm injection: reproductive reality in couples with sterility].

Background: The intacytoplasmic sperm injection (ICSI) is the assisted reproduction technique (ART) that currently offers satisfactory results to infertile couples. The use of epididymal surgical retrieval (percutanean epydidimal sperm aspiration: PESA) and testicular sperm retrieval (testicular sperm extraction: TESE) combined with ICSI has come to bring a high response to azoospermic male.

Objective: To communicate the results obtained from the Institute for the Study of Human Conception, in Monterrey, NL, with the application of the ICSI technique with ejaculate sperm and in azoospermic patients using sperm obtained from PESAor by testicular sperm extraction TESE.

[Endometrial thickness. Prognostic factor in assisted reproduction?].

Background: Most authors coincide that an endometrial thickness lesser than 8 mm has a very low pregnancy rate.

Objective: To determine if the measurement of endometrial thickness by vaginal ultrasound has a prognostic value over the pregnancy rate in patients with endometrial preparation for an embryo transfer in cycles of frozen embryos and ovum donation.

Study Design: Retrospective and comparative.

[High concentrations of serum estradiol in assisted reproduction].

Objectives: To analyze the influence of the levels of estradiol on the day of HCG in the pregnancy rate (PR) of ICSI and oocyte donation.

Study Design: Retrospective, comparative.

Material And Methods: 333 patients underwent ICSI and 66 in oocyte donation were included dividing them according to the level of estradiol: a) < 1,000 pg/mL, b) 1,001-3,000 pg/mL and c) > 3,000 pg/mL.

[Prognostic values of oestradiol/oocyte rate in ICSI patients].

Objectives: To analyze the pregnancy rate in women who underwent Intracytoplasmic Sperm Injection (ICSI) program depending of the oestradiol/oocyte index.

Study Design: Retrospective, comparative.

Material And Methods: 332 patients were included.

[Comparison of GnRH agonists and antagonists in an ovular donation program].

Introduction: GnRH agonists and antagonists are utilized for avoiding premature ovulation in assisted reproductive cycles, (ART) this retrospective study was designed to compare both treatments in controlled ovarian hyperstimulation (HOC) in oocyte donors.

Material And Methods: Between Jan99 and Mar03, 141 oocyte donors underwent ART receiving either 0.25 mg daily of a GnRH antagonist (Cetrorelix) from day 6 of stimulation (51 patients) or a long protocol with a GnRH agonist (Leuprolide acetate) (90 patients.

[Methodology in gynaecological clinical research].

Every day the number of published articles in the world wide literature is increased; unfortunately, lot of them lack of a proper research-related methodology and therefore the conclusions might be of less scientific value. Clinicians need to develop their professional exercise based on scientific knowledge and so it is imperative to be familiar with research-related methodology. The present paper offers some tips in order to facilitate the reading and correct interpretation of clinical research.

[Comparison of the results of an assisted-reproduction program related with the day of follicular aspiration].

Unlabelled: The proper time for the oocyte retrieval allow us to obtain good quality oocytes In assisted reproduction techniques, improving fertilization and pregnancy rates. The follicular aspiration has been done by vaginal ultrasounds when we can see at least 3 follicles > or = 16 mm diameter.

Objective: To compare oocyte quality, fertilization and pregnancy rate-according to the day of the follicular aspiration.

[Influence of sperm morphology on results of intrauterine insemination].

Objective: To determine the influence of sperm morphology, according to WHO criteria, on pregnancy rates of couples who were submitted to intra-uterine insemination (IUI).

Material And Methods: Retrospective study that included 787 IUI cycles performed in the Instituto para el Estudio de la Concepción Humana in Monterrey, Mexico, from January to December 2002. Main diagnosis were anovulation, male factor, endometriosis, and cervical factor.

[Vaginal misoprostol in the prevention of postpartum hemorrhage].

Objective: To show the advantages of the use of vaginal misoprostol, a prostaglandine E1 analogue, in the prevention of the post-partum haemorrhage.

Material And Methods: This was a prospective, observational, comparative study. The study included 400 patients with high risk of postpartum haemorrhage at our center between January 1999 and may 2001.