The aim of this project was to test the hypothesis that progesterone concentration 5 days after ovulation did not differ between pregnant and nonpregnant Thoroughbred mares on stud farms located in the Waikato region of New Zealand. A prospective cohort study was performed involving five stud farms ...

The equine chorionic girdle is comprised of specialized invasive trophoblast cells that begin formation approximately 25 days after ovulation (day 0) and invade the endometrium to become endometrial cups. These specialized trophoblast cells transition from uninucleate to differentiated binucleate...

Next-generation in vitro culture model systems are needed to study the reproductive pathologies that affect domestic animals. These 3D culture models more closely mimic normal physiological function to allow a greater understanding of reproductive pathology and to trial therapeutics without the...

Breeding a bitch with two different sires during a single estrous cycle has the potential to facilitate rapid genetic gain and improve reproductive performance within a canine breeding colony. There is limited data regarding the factors that contribute to the success of dual-sired litters in...

Development of assisted reproductive technologies (ART) in the domestic dog, including in vitro fertilization, has lagged behind other species. This can be attributed to some unique challenges in dogs, including prolonged anestrus periods resulting in infrequent ovulation events,1 the 2-3 day...

Appropriate timing of insemination in the bitch, through monitoring of serial serum progesterone concentrations, has historically been based on the detection of important physiological reproductive events which include the LH surge and ovulation 2-3 days later. Previous hormone profile studies...

Anti-Müllerian hormone (AMH) is a reliable endocrine marker of ovarian reserve in many species with extensive literature in both humans and cattle. However, there are no known hormonal predictors of ovarian reserve and potential reproductive performance in the bitch. A prospective cohort study was...

The aim of this prospective cohort study was to utilize multivariable statistical methods to identify factors that significantly affected whelping rate, litter size and gestation length in a large population of bitches of many different breeds, presented for routine breeding management. In...

Despite the high prevalence of primary uterine inertia in whelping bitches, the underlying pathogenesis remains unclear. The objectives were to (i) determine serum concentrations of total calcium, ionized calcium (iCa), parathyroid hormone (PTH), and blood pH in normally whelping bitches throughout ...