Effect of Stress on Ovarian Follicular Activity in Postpartum Sahiwal Cows during Hot-humid Season

Effect of lameness on ovarian activity in postpartum holstein cows.

A longitudinal study was conducted to examine the relationship between lameness and delayed ovarian cyclicity during the first 60 d postpartum and days to first luteal activity during the first 300 d postpartum in Holstein cows. Two hundred thirty-eight cows from a 600-cow dairy that calved during a 12-mo period were used. Cows were classified into 1 of 6 categories of lameness during the first...

Effect of season of lambing and suckling on ovarian activity and postpartum conception

the effect of e-64 on the developmental competence of sheep cocs during in vitro maturation

in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.

Effect of Hot Humid and Winter Season on Circulatory Catecholamine, Milk Composition and Physiological Responses in Cows

Two sets of experiments were carried out on lactating crossbred cows during hot humid (HH) (temp. 2434°C, RH 98%)and winter season (temp.1.97-19.90°C, RH 60-70%). The cows were managed in a loose housing system and was producing milk yield of9.00 to 10.11kg /d. Samples of milk and blood were collected and the physiological responses were recorded at weekly interval in the morning and afternoon ...

Oestrus and Ovarian Activity in Lactating Sahiwal-shorthorn Beef Cows in South-eastern Queensland

Oestrus and ovarian activity were studied in a group of crossbred SahiwalShorthorn beef cows over four lactation periods of varying length throughout different seasons of the year. In the first lactation, cows were in poor condition (body weight 303 kg) and the mean interval from calving to first oestrus was 2202 16 days. Five COWS were still anoestrus 18 months after calving and were culled. T...