P-64: Strategies to Optimize Reproductive Efficiencyby Regulation of Ovarian Function inyak (Poephagus Grunniens L.)

Effect of thawing methods on frozen semen quality of yak (Poephagus grunniens L.) bulls.

AIM To evaluate different thawing temperatures and duration on the post-thaw semen quality of Indian yaks bulls. MATERIALS AND METHODS Semen ejaculates from four different yak bulls were collected using artificial vagina method and extended with tris extender containing 6.4% glycerol at 35°C, cooled gradually from 35°C to 5°C at 1°C/3 min and equilibrated at 4-5°C for 4 h and frozen in French...

Effects of high altitude and season on fasting heat production in the yak Bos grunniens or Poephagus grunniens.

Thirty growing yaks Bos grunniens or Poephagus grunniens, 1.0-3.5 years and 50-230 kg, from their native altitudes (3000-4000 m), were used to study the basal metabolism in this species and to evaluate the effects of high altitude and season on the energy metabolism. Fasting heat production (FHP) was measured at altitudes of 2260, 3250 and 4270 m on the Tibetan plateau in both the summer and th...

Management Strategies to Optimize Reproductive Performance of Dairy Herds

Utero-ovarian interaction in the regulation of reproductive function.

The physiological regulation of fertile reproductive cycle in mammals depends on interactions between hypothalamus-pituitary, ovarian and uterine stimuli. Over the past 20 years, much has been learned about the interrelation between the affluent and effluent lymph and vascular drainage in and around both ovarian and uterine tissues. An essential feature in the regulation of the fertile cycle is...

Strategies for Pituitary Down-regulation to Optimize IVF/ICSI Outcome in Poor Ovarian Responders

The ovarian stimulation of poor responders still remains a challenging task for clinicians. There are numerous strategies that have been suggested to improve the outcome in poor responders but there is still no one pituitary down-regulation protocol that best suits all women with such condition. Traditional GnRH agonist flare and long luteal phase protocols do not appear to be advantageous. Red...

Postpartum endocrinology and prospects for fertility improvement in the lactating riverine buffalo (Bubalus bubalis) and yak (Poephagus grunniens L.)

In many Asian countries the riverine buffalo is the major milk producing animal besides contributing towards draught power and meat production. The animal however suffers from inherent reproductive problems such as poor estrus expression and long calving intervals which limits its lifetime production. The yak is a seasonal breeder and the mainstay of highlanders and tribal populations inhabitin...