Background: Ovsynch is one of the most adopted estrus synchronization protocols used for ovulation and fixed-time artificial insemination however, new corpus luteum (CL) induced by first GnRH treatment in inappropriately regressed with a single prostaglandin F2α. Inadequate CL regression reduces fertility. Considering this rationale, present research was implemented effect second F2 alpha durin...

BACKGROUND: We investigated whether the psychological stress related to a short war (26 June–7 July, 1991) in Slovenia induced changes in fertility, sex ratio at birth and semen quality characteristics. METHODS: Sex ratios [i.e. males/(males females)] for 4966 births in the general population of Slovenia and separately for 1565 births in the Slovenian capital, Ljubljana, from January–March 1992...

The aim of this study was to evaluate the association between semen quality and the secondary sex ratio (SSR), defined as the ratio of male to female live births. Our study cohort comprised 227 male partners who were enrolled prior to conception in Michigan and Texas between 2005 and 2009, and prospectively followed through delivery of a singleton birth. The male partners provided a baseline an...

The objective was to determine whether transfer of fresh or vitrified embryos produced in vitro with sex-sorted semen improves pregnancy and calving rates during summer in lactating dairy cows compared with artificial insemination (AI). Lactating dairy cows (n=722) were enrolled during summer months at 2 commercial dairies in Central Texas and randomly assigned to 1 of 3 treatments: AI with con...

There has and will continue to be reproductive techniques available that have a positive impact upon the equine breeding industry. This review focuses on semen technologies that have been developed or are in the process of being developed. The use of fluorescent dyes and flow cytometry has provided the researcher and clinician with powerful tools to evaluate several sperm attributes. These proc...