The impact of microfluidics sperm processing on blastocyst euploidy rates compared with density gradient centrifugation: a sibling oocyte double-blinded prospective randomized clinical trial.

Objective: To compare the euploidy rates among blastocysts created from sibling oocytes injected with sperm and processed using microfluidics or density gradient centrifugation.

Design: Sibling oocyte randomized controlled trial.

Setting: Single university-affiliated infertility practice.

Attitudes towards disposition of cryopreserved sperm in the event of death.

Introduction: To evaluate patient preference for sperm disposition in case of death based on demographic factors and infertility etiology.

Materials And Methods: This retrospective cohort study was performed at a university hospital-affiliated fertility center. Charts of 550 men undergoing cryopreservation for assisted reproductive technologies (ART) between 2016-2019 were reviewed to create a descriptive dataset.

Rationale and study design of a double-blinded prospective randomized clinical trial comparing euploidy rates among embryos created from sibling oocytes injected with sperm processed by microfluidics or by density gradient centrifugation.

Background: During the in vitro fertilization (IVF) process, sperm must be processed prior to insemination. While the most common method, density gradient centrifugation, can potentially damage sperm during centrifugation, a recent advancement in sperm processing uses a microfluidics system which selects for the most highly motile sperm. In selecting for these sperm which may be of higher quality, the euploidy rates of embryos created as a result may also be improved.

Independent serum markers of corpora lutea function after gonadotropin-releasing hormone agonist trigger and adjuvant low dose human chorionic gonadotropin in in vitro fertilization.

Objective: To characterize corpora lutea (CL) function after gonadotropin-releasing hormone agonist (GnRHa) trigger with the use of adjuvant human chorionic gonadotropin (hCG).

Design: Secondary analysis of serum from prospective randomized clinical trial.

Setting: University-based fertility center.

The National Physicians Cooperative: transforming fertility management in the cancer setting and beyond.

Once unimaginable, fertility management is now a nationally established part of cancer care in institutions, from academic centers to community hospitals to private practices. Over the last two decades, advances in medicine and reproductive science have made it possible for men, women and children to be connected with an oncofertility specialist or offered fertility preservation soon after a cancer diagnosis. The Oncofertility Consortium's National Physicians Cooperative is a large-scale effort to engage physicians across disciplines - oncology, urology, obstetrics and gynecology, reproductive endocrinology, and behavioral health - in clinical and research activities to enable significant progress in providing fertility preservation options to children and adults.

Sequential embryo assessment outperforms investigator-driven morphological assessment at selecting a good quality blastocyst.

Two selection methods (morphology-only and a sequential embryo assessment algorithm) were compared within the same IVF clinic to determine which method best identifies the embryos on day 3 that will develop into the highest quality on day 5. The sequential embryo assessment algorithm was significantly better at selecting the best embryo and selecting a blastocyst compared with the morphology-only method.

A soluble molecule secreted by human blastocysts modulates regulation of HOXA10 expression in an epithelial endometrial cell line.

Objective: To determine the existence of a soluble signal, secreted from the human blastocyst embryo, that induces HOXA10 gene expression before cell-cell contact.

Design: To analyze, by semiquantitative reverse transcriptase polymerase chain reaction (RT-PCR), cell-free media that had contained human embryos cultured to the blastocyst stage for a soluble molecule that induces HOXA10 expression in an endometrial epithelial cell line (Ishikawa).

Setting: Assisted reproduction technology program of Yale University, New Haven, Connecticut.

Ubiquitin-dependent sperm quality control mechanism recognizes spermatozoa with DNA defects as revealed by dual ubiquitin-TUNEL assay.

Defective mammalian spermatozoa become ubiquitinated during epididymal passage, a mechanism that may mark the abnormal spermatozoa for proteolytic destruction (Sutovsky et al., 2001a: J Cell Sci 114:1665-1675). It is not known how such spermatozoa are recognized by the epididymal ubiquitination pathway and whether there is a selection against certain types of sperm defects.