Lessons learned from 64,071 embryos subjected to PGT for aneuploidies: results, recurrence pattern and indications analysis.

Research Question: What is the influence of biological, technical and clinical factors on embryo outcomes in preimplantation genetic testing for aneuploidies (PGT-A) and what is the recurrence pattern?

Design: This retrospective study included 64,071 embryos undergoing PGT-A in the same laboratory between 2011 and 2019. Biopsies were performed at the day 3 embryo stage (48.32%) or blastocyst stage (51.

Factors influencing natural fecundity in fertile couples: a survey of puerperae and their partners.

Research Question: What is the fecundity rate among fertile couples, and which factors influence it?

Design: Retrospective study of all puerperae attending Cruces University Hospital Human Reproduction Unit over 9 months. An anonymous questionnaire was circulated to all patients, and 2510 valid completed questionnaires were collected. The main inclusion criterion was natural conception resulting in delivery.

Safety of Plasma Rich in Growth Factors (PRGF) as additive to healthy human sperm samples: a pilot study.

Objective: The aim of our study was to assess if the addition of PRGF to healthy human sperm affects its motility and vitality.

Methods: This was a prospective study, with 44 sperm donors on whom sperm analysis was performed. Nine mL of blood was collected and PRGF was obtained using PRGF-Endoret® technology.

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.

Early Spontaneous Twinning Recorded By Time-Lapse.

Monozygotic twins (MZT) are 2.5 times more frequent in ART than in natural conceptions. A number of ART-related mechanisms have been probably linked with MZT.