Jens Fedder

Background/Objectives: Cryopreservation technology used in assisted reproductive technology (ART) has significantly improved live birth rates by enabling multiple embryo transfers with frozen embryos from a single ovarian stimulation cycle.…

BackgroundOnly approximately 30% of conceptions result in live births. Historically, research has predominantly focused on maternal factors impacting pregnancy success, despite the cause remaining unidentified in most cases. The influence o…

This was a nationwide cohort study based on Danish health registers focusing on assisted reproductive technology (ART) treatments in women using donor or partner sperm from 2007 to 2017. Women using donor sperm were subdivided into groups b…

In this study we investigated whether age of men undergoing assisted reproductive technology (ART) treatment was associated with day of transfer, stage, morphology, and initial hCG-rise of the competent blastocyst leading to a live birth? T…

Here we have summarized what is currently known about menstruating animal species with special emphasis on non-primate species: length of their menstrual cycle, ovulation, implantation, placentation, decidualization, and endometrial charact…