Serological follow up of positive SARS-CoV-2 cases.

Objective: To describe the humoral response in a cohort with mild and asymptomatic SARS-CoV-2 infection previ-ously identified in a community-based serological survey.

Materials And Methods: This study was an observational follow up of 193 subjects previously identified with positive anti-SARS-CoV-2 antibodies invited for a second test 112 days after the first sampling. All completed a standardized electronic questionnaire.

Evaluation of the Ovarian Reserve in Women With Systemic Lupus Erythematosus.

Systemic lupus erythematosus (SLE) is a chronic multisystem autoimmune disorder where the disease activity itself and the medications used for its treatment, may have adverse effects on ovarian function. This study aimed to assess the ovarian reserve (OR) in SLE patients. The anti-müllerian hormone (AMH) and the antral follicle count (AFC), two markers to evaluate the OR was assessed in 64 SLE patients and compared to normal individuals.

Prevalence and associated characteristics of anti-SARS-CoV-2 antibodies in Mexico 5 months after pandemic arrival.

Background: Seroprevalence of anti-SARS-CoV-2 antibodies is now available in several world regions to better estimate transmission dynamics. However, to date, there is no epidemiological data regarding anti-SARS-CoV-2 prevalence in Mexico. Therefore, we aimed to determine the prevalence of anti-SARS-CoV-2 antibodies and define the clinical and demographic characteristics associated with seroprevalence.

Maternal Folic Acid Intake and Methylation Status of Genes Associated with Ventricular Septal Defects in Children: Case-Control Study.

Background: DNA methylation is the best epigenetic mechanism for explaining the interactions between nutrients and genes involved in intrauterine growth and development programming. A possible contributor of methylation abnormalities to congenital heart disease is the folate methylation regulatory pathway; however, the mechanisms and methylation patterns of VSD-associated genes are not fully understood.

Objective: To determine if maternal dietary intake of folic acid (FA) is related to the methylation status (MS) of VSD-associated genes (AXIN1, MTHFR, TBX1, and TBX20).

Early triglyceride and glucose index as a risk marker for gestational diabetes mellitus.

Objective: To assess the risk of gestational diabetes mellitus (GDM) according to the triglyceride and glucose (TyG) index values during the first trimester of pregnancy in Latin American women.

Methods: Pregnant women were enrolled at their first prenatal visit at the Obstetric Division in the University Hospital "Dr. José E.

Diagnostic accuracy of the triglyceride-glucose index for gestational diabetes screening: a practical approach.

The oral glucose tolerance test (OGTT) remains as the gold standard to diagnose gestational diabetes mellitus (GDM); however, this test may be inconvenient and costly. Hence, other easy to perform and accurate diagnostic alternatives would be valuable for maternal care. The objective of the study was to assess the diagnostic performance of the TyG index to screen for GDM at 24-28 of pregnancy.

The elimination of apoptotic sperm in IVF procedures and its effect on pregnancy rate.

Objective: To identify the effect of apoptotic sperm elimination with MACS in patients that require IVF.

Methods: An experimental, cross-sectional, descriptive, prospective and non-blinded study of diagnostic tests performed in patients who required IVF and ICSI from July 2011 to July 2012. Ninety-two couples participated according to the treatment administered to the semen sample; in the control group: the samples were subjected only to density gradients before ICSI, in the study group: the same procedure was performed plus the addition of the MACS technique.

Rapid spread of an ongoing outbreak of Zika virus disease in pregnant women in a Mexican hospital.

In the first nine weeks of implementation of a Zika Virus Preparedness Plan in a Mexican Public Hospital, we cared for 221 pregnant women with any signal or symptom suggesting Zika virus infection and 99 (44.8%) patients were found to be positive for Zika virus. The median age of patients was 25.

[Clinical experience of combined oral contraceptives of low doses in Mexico].

Background: The combined oral contraceptives are one of the most prescribed medicines. Across the years they have given to more than 60 million women of the whole world a suitable method for the highly reliable and effective natal control. The oral contraceptives are different from other medicines; principally they are not in use for controlling any disease and have the potential of giving advantages.

[In vivo effect of endometria's and human cervix's secretions on the spermatozoid].

Objective: To demonstrate the capacitance stages acquired by the spermatozoa after the in vivo contact with the endometrium and the human cervical canal.

Study Type: Experimental, prospective, and longitudinal.

Materials And Methods: Spermatozoa obtained from the cervix and endometrium, plus post-capacitated semen in a 1 and 4 hours process, from couples that have proved fertility, were processed to evaluate motility, morphology, vitality and identification of morphological patterns with chlortetracycline and then inducted to acrosomal reaction with ionophore A23187.

[Acrosomic reaction of human spermatozoid demonstrated with clorotetracycline].

Background: Sperm preparation and acrosomic reaction have been largely studied to explain the physiology of sperm as reproductive cell.

Objective: To identify the morphological changes on in vitro prepared human sperm cells and in spontaneous and ionophore A23187 induced acrosome reaction of infertile males, through the application of the chlortetracycline test.

Design: Experimental prospective study.