Comparison of the Administration of 150 or 75 of Recombinant LH in Agonist ICSI Cycles Stimulated with Recombinant FSH in Women Aged 35-39: A Comparative Study.

Background: The purpose of the study was to assess whether the coadministration of 150 of recombinant LH instead of 75 in women aged 35-39 improves the results in agonist ICSI cycles stimulated with 300 of recombinant FSH.

Methods: In this study, two ovarian stimulation protocols coexisted which were identical except in the administered dose of recombinant LH, for which some patients received 150 (n=231) and some received 75 (n=216). Both groups received 300 of recombinant FSH.

Endometriosis Increases the Risk of Placenta Previa in Both IVF Pregnancies and the General Obstetric Population.

Is there a relationship between endometriosis and placenta previa (PP)? To investigate if there is a relationship between endometriosis and PP, a retrospective study was carried out, using prospectively recorded data from two different databases from Cruces University Hospital. Two different populations were included in the study. The ART (assisted reproduction techniques) population consisted of 246 cesarean sections (CS), from a total of 1170 deliveries, and the obstetric population consisted of 7045 CS, from a total of 50,298 deliveries.

Oocytes of women who are obese or overweight have lower levels of n-3 polyunsaturated fatty acids compared with oocytes of women with normal weight.

Objective: To ascertain whether the oocytes of women who are obese or overweight have a different fatty acid (FA) profile than women with normal weight.

Design: Prospective case-control study.

Setting: Two IVF centers.

Infertile Couples Prefer Twins: Analysis of Their Reasons and Clinical Characteristics Related to This Preference.

Background: The number of multiple pregnancies has been significantly increased in the last decades due to assisted reproduction techniques development. Compared to singleton, twins and multiple pregnancies are associated to more complications and risks for both mother and children. The objective of this study was to examine the proportion of patients preferring a multiple birth over a singleton after an IVF/ICSI attempt, their reasons and the influence of socio-demographic and clinical parameters on their preference.

Proteomic pattern of implantative human endometrial fluid in in vitro fertilization cycles.

Purpose: To assess whether there are proteins in endometrial fluid aspirate (EFA) that predict implantation.

Methods: The population under study consisted of 285 women undergoing embryo transfer (ET). Endometrial fluid aspiration was performed immediately before ET.

Modifications in the Consumption of Energy, Sugar, and Saturated Fat among the Mexican Adult Population: Simulation of the Effect When Replacing Processed Foods that Comply with a Front of Package Labeling System.

A Mexican Committee of Nutrition Experts (MCNE) from the National Institute of Public Health (INSP), free from conflict of interest, established food content standards to place the front-of-package (FOP) logo on foods that meet these nutrition criteria. The objectives were to simulate the effect on nutrient intake in the Mexican adult population (20-59 years old) after replacing commonly consumed processed foods with those that meet the FOP nutrition-labeling criteria. Twenty-four hour dietary recalls were collected from the 2012 Mexican National Health and Nutrition Survey ( = 2164 adults).

Dynamic of expression and localization of cannabinoid-degrading enzymes FAAH and MGLL in relation to CB1 during meiotic maturation of human oocytes.

The endogenous cannabinoid system has been characterized in some female reproductive organs but little is known about the expression and localization pattern of cannabinoid-degrading enzymes in relation to the CB1 cannabinoid receptor in human oocytes. In this study, we focus on the investigation of the presence and differential distribution of fatty acid amide hydrolase (FAAH) and monoglyceride lipase (MGLL) in relation to CB1 during the maturation of human oocytes. We used a total of 290 human oocytes not suitable for in vitro fertilization/intracytoplasmic sperm injection (ICSI): germinal-vesicle (GV) and metaphase-I (MI) stages and metaphase-II (MII) oocytes that had not developed into an embryo after ICSI.

Dynamics of expression and localization of the cannabinoid system in granulosa cells during oocyte nuclear maturation.

Objective: To describe the expression of cannabinoid receptors CB1 and CB2 and cannabinoid-degrading enzymes fatty acid amide hydrolase (FAAH) and monoglyceride lipase (MGLL) in human granulosa cells and to investigate their differential distribution with respect to CB1 at various stages during the nuclear maturation of the oocyte.

Design: Analysis of granulosa cells from germinal vesicle (GV), metaphase I (MI), and MII oocytes by quantitative reverse transcriptase-polymerase chain reaction, Western blot, and indirect immunofluorescence assays.

Setting: Academic research laboratory.

Failure of intrauterine insemination as rescue treatment in low responders with adequate HCG timing with no oocytes retrieved.

In this retrospective study, the efficiency of carrying out rescue intrauterine insemination (IUI) in low-responder patients undergoing IVF when no oocytes were retrieved after follicular aspiration and when HCG timing was adequate was analysed. A historical control group was used. Over 13 years, women undergoing IVF with failure to obtain oocytes at follicular aspiration underwent rescue IUI if the following criteria were met: adequate HCG timing; one normal tube; motile sperm count after preparation over 3 million/ml; and ultrasound visualization of one to six follicles over 13 mm.

Quality of additional embryos transferred on pregnancy outcomes in IVF: predictions using a mathematical approach.

This study assessed the influence of adding embryos with different embryo quality on pregnancy rate and multiple pregnancy rate (MPR). The study included 1891 IVF transfers performed at two centres with different embryo transfer policies. Pregnancy rate and MPR were analysed following three models and then including embryo quality.

Prevention of ovarian hyperstimulation syndrome in GnRH agonist IVF cycles in moderate risk patients: randomized study comparing hydroxyethyl starch versus cabergoline and hydroxyethyl starch.

Objective: To assess whether, in GnRH agonist IVF cycles where there is a risk of ovarian hyperstimulation syndrome (OHSS), the addition of cabergoline to the hydroxyethyl starch (HES) infusion could decrease OHSS incidence and severity.

Materials And Methods: Prospective randomized study. The population under study consisted of women undergoing IVF cycles with GnRH agonist protocols, at risk of OHSS (more than 20 follicles observed larger than 12 mm in diameter and/or estradiol levels of 3000-5000 pg/mL).

Hysteroscopic hydrosalpinx occlusion with Essure device in IVF patients when salpingectomy or laparoscopy is contraindicated.

Objective: To evaluate, in patients with hydrosalpinges, the effect on in vitro fertilization (IVF) outcome of the insertion by hysteroscopy of an intratubal blocking device, in cases where laparoscopic salpingectomy or laparoscopy was contraindicated.

Study Design: A prospective interventional case series study was conducted in fifteen women with unilateral (N=6) or bilateral hydrosalpinges (N=9) submitted for IVF. In all of them, laparoscopic salpingectomy was contraindicated.

Expression and localization of opioid receptors during the maturation of human oocytes.

The endogenous opioid system has been characterized in some female reproductive organs, but little is known about the expression of these receptors in human oocytes. This study investigated the presence and differential distribution of the opioid receptors during the maturation of human oocytes. A total of 821 human oocytes from an intracytoplasmic sperm injection (ICSI) programme were studied including 213 at germinal-vesicle (GV) stage and 164 at metaphase-I (MI) stage and 444 failed fertilization metaphase-II (MII) oocytes.

Glutathione peroxidase activity in seminal plasma and its relationship to classical sperm parameters and in vitro fertilization-intracytoplasmic sperm injection outcome.

Objective: To relate the glutathione peroxidase (GPX) activity level in human seminal plasma with standard semen parameters and spermatozoa fertilization potential in terms of fertilization and pregnancy rates in an IVF program.

Design: Prospective study.

Setting: Human Reproduction Unit at Cruces Hospital (Vizcaya, Spain).

Daily workload in the embryology laboratory and in vitro fertilization results.

Objective: To ascertain if the daily activity in the in vitro fertilization (IVF) laboratory is related to pregnancy rates (PR) and fertilization rates (FR) in an IVF program.

Study Design: A retrospective study was performed to compare the PR and the FR obtained in 845 oocyte retrievals (OR) and 713 embryo transfers (ET), according to the daily workload. Different cutoffs were established: < or = 3 OR per day vs.

The implantation of every embryo facilitates the chances of the remaining embryos to implant in an IVF programme: a mathematical model to predict pregnancy and multiple pregnancy rates.

Background: We aimed to assess the validity of a theoretical mathematical model to predict the pregnancy rate and the multiple pregnancy rate in IVF/oocyte donation programmes on the basis of the implantation rate and the number of transferred embryos.

Methods: A total of 1835 embryo transfers corresponding to three different programmes in two centres with different implantation rates were analysed. Pregnancy and multiple pregnancy rates observed in the aforementioned programmes were compared with those obtained following different mathematical models.

[Absence of antiosteopenic effect of hormone replacement therapy in postmenopausal women].

Background: Several studies suggest that hormone replacement therapy (HRT) stops bone loss in postmenopausal women while increasing their bone mineral density up to 20%; however, there are studies where hormone replacement therapy does not increase bone density, only prevents it.

Objective: To analyze the effect of hormone replacement therapy upon bone mineral density of hip and lumbar spine in postmenopausal women.

Material And Methods: Clinical files of several patients with sudden menopause diagnosis seen at the Hospital Juarez of Mexico were reviewed in the year 2000.

Converting an IVF cycle to IUI in low responders with at least 2 follicles.

Objective: To assess the utility of transforming an in vitro fertilization (IVF) cycle with low ovarian response to an intrauterine insemination (IUI) cycle.

Study Design: The inclusion criteria were women undergoing IVF because of idiopathic infertility, a mild to moderate male factor or IUI failure, with at least 1 normal, patent tube. When ovarian stimulation produced 2-4 follicles > or = 18 mm, the IVF cycle was converted to an IUI cycle.

[Correlation between menstruation disorders and insulin resistance].

Unlabelled: The association between menstrual cylce abnormalities and insulin resistance in parallel to further clinical and biochemical findings was evaluated.

Material And Methods: An observational, retrospective and transversal study was performed through a review of clinical charts of female patients (18-35 years old) who had undergone pelvic ultrasound seen at our service of Reproductive Biology in the Hospital Juárez de México form January 1996 to May 2002 with the following: abnormal menses (n = 22), eumenorrhea as controls (n = 28); without uterine or ovarian tumors, endocrine dysfunction or contraceptives. We assessed body mass index (BMI), waist hip ratio (WHR), ferriman, acanthosis nigricans, lipid profile and hormonal quantification.

[Polycystic ovarian disease: clinical and biochemical expression].

Unlabelled: The policystic ovary (PO) results from a systemic hormonal dysfunction, characterized by hyperandrogenemia, insulin resistance and anovulation.

Objective: Assessment was made of clinical and biochemical features of patients with PO.

Material And Methods: A retrospective analysis of 211 clinical of charts of patients with ultrasonographic diagnosis of PO seen at the Hospital Juárez de México from 1996 to 2000 was performed.