The objective was to improve pregnancy per artificial insemination (P/AI; 35–42 d after AI) in
virgin Jersey heifers bred by AI of sex-sorted semen after being detected in estrus. Giving …

This experiment was designed to test the hypothesis that delayed insemination of
nonestrous cows would increase pregnancy rates when using sex-sorted semen in …

As oestrous expression of dairy cows has decreased over the last decades oestrus detection
has become more difficult. The objective of this study is to identify the main factors that affect …

We have carried out a field trial in cattle to study the effect of the interval between the onset
of estrus and AI on sex ratio and fertility. Data were obtained from 716 cows that had been …

The management of bovine reproduction is the cornerstone of health provision in elite herds.
Aims and objectives for reproductive performance should be herd specific and data to …

The objective of this observational experiment was to determine the association between the
interval from reaching activity threshold (AT) to artificial insemination (AI) with sex-sorted …

Methods of pregnancy diagnosis in the domestic animals can be classified into visual,
clinical and laboratory methods. In most domestic animals clinical methods are currently …

Six-day-old bovine ova/embryos were recovered non-surgically and used as biomonitors to
evaluate time of artificial insemination. These embryos/ova provided information regarding …

Our objective was to evaluate the effect of a second PGF 2α treatment and duration of an
Ovsynch protocol that included a progesterone-releasing intravaginal device (PRID) on …

Repeat breeding (RB) continues to be a big problem for breeders and veterinary clinicians.
A brief mention is made of the common aetiological and risk factors for RB in cattle and …