Impact of serum progesterone level on the day of embryo transfer on live birth rate after single frozen-thawed blastocyst transfer in hormone replacement therapy cycles.

Purpose: As the number of frozen-thawed embryo tryansfer cycles with Hormonal Replacement Therapy increases, the issue of the optimal progesterone level to ensure maximal success rates becomes critical. In this study, we aimed to determine the respective relevance of the 3 recently reported progesterone thresholds using an original statistical method.

Methods: This single-center retrospective study was conducted in a University-based Hospital in France in all consecutive single frozen thawed blastocyst transfers (SFBT) performed with HRT protocol in 2021.

Fertility preservation for transgender, non-binary, and gender-expansive individuals in France: A comprehensive assessment of healthcare services and practices.

Introduction: Fertility preservation (FP) consultations are recommended before treatments that may affect fertility, including gender-affirming hormone therapy (GAHT). While some FP centers in France assist individuals undergoing gender transition, many transgender, non-binary, and gender-expansive individuals still choose not to pursue gamete cryopreservation. This study provides an overview of access to FP for transgender individuals in France in 2021.

Comparison of serum inhibin A and estradiol levels for monitoring ovarian stimulation in IVF: a preliminary study.

Introduction: Controlled Ovarian Hyperstimulation (COH) is crucial in Assisted Reproductive Techniques (ART), as it determines the number of mature oocytes retrieved, a key factor in pregnancy success. Serum estradiol (E2) is commonly used alongside transvaginal ultrasound (TVUS) to monitor ovarian response, but its accuracy is limited due to secretion from multiple follicular categories. In contrast, serum Inhibin A, primarily secreted by mature antral follicles, may offer a more accurate reflection of follicular maturity.

Ultra-Fast Warming Procedure of Vitrified Blastocysts Results in Maintained Embryology and Clinical Outcomes.

Vitrification has revolutionized embryo cryopreservation, but represents a significant workload in the IVF lab. We evaluated here an ultrafast blastocyst warming procedure in order to improve workflow while maintaining clinical outcome. We first evaluated the expression of main markers of lineage specification in a subset of blastocysts donated to research warmed with ultrafast protocol.

Telomere Length, a New Biomarker of Male (in)Fertility? A Systematic Review of the Literature.

Male factors are suspected in around half cases of infertility, of which up to 40% are diagnosed as idiopathic. In the context of a continuously increased resort to ART and increased decline of semen parameters, it is of greatest interest to evaluate an additional potential biomarker of sperm quality. According to PRISMA guidelines, this systematic review of the literature selected studies evaluating telomere length in sperm and/or in leukocytes as a potential male fertility biomarker.