Adequate endometrial preparation with exogenous steroids is mandatory for successful ovum donation. This study was undertaken to assess the value of endometrial thickness by ultrasound and serum oestradiol as predictors of ovum donation outcome and to analyse the correlation between serum oestradiol concentrations and the endometrial thickness. Endometrial thickness and serum oestradiol concent...

When females mate promiscuously, sperm from rival males compete within the female reproductive tract to fertilize ova. Sperm competition is a powerful selective force that has shaped sexual behavior, sperm production, and sperm morphology. However, nothing is known about the influence of sperm competition on fertilization-related processes, because it has been assumed that sperm competition onl...

1. Baldassarre H., 2021. Laparoscopic Ovum Pick-Up Followed by In Vitro Embryo Production and Transfer in Assisted Breeding Programs for Ruminants. Animals 11, 216, https://doi.org/10.3390/ani110.... CrossRef Google Scholar

Rabbit ova were transferred to both sides of synchronous pseudopregnant recipients; on one side the ova were transferred to the ovarian bursa to assess the efficiency of ovum reception, and on the other side were deposited within the Fallopian tube to provide informa¬ tion on ovum transport. The recipients were treated with oestrogens, progesterone, or combinations of these hormones. Ova were a...