AIM The present investigation was undertaken to study the reproduction performance and effect of non-genetic factors on reproduction performance of Jersey crossbred cows. MATERIALS AND METHODS Data on 355 Jersey crossbred cattle maintained at the Post-graduate Research Institute in Animal Sciences, Kattupakkam, Tamil Nadu, distributed over 30 years (1985 to 2014). The effect of various non-ge...

Post-calving anestrus leads to serious economic losses and is the reason for animal culling. Deficiency of estrogen hypofunctional state ovaries due negative energy balance, as well violations timing postpartum involution uterus are considered leading causes an extended anovulatory period in fresh cows. A comparison was made therapeutic efficacy Ovsynch scheme Ovariovit preparation when used fi...

Variance and covariance components for milk yield, survival to second freshening, calving interval in first lactation were estimated by REML with the expectation and maximization algorithm for an animal model which included herd-year-season effects. Cows without calving interval but with milk yield were included. Each of the four data sets of 15 herds included about 3000 Holstein cows. Relation...

Efficient calving surveillance is essential for avoiding stillbirth due to unattended dystocia. Calving sensors can help detect the onset of parturition and thus ensure timely assistance if necessary. Tail-raising an indicator imminent calving. The objective this study was evaluate a tail-mounted inclinometer sensor (Moocall Ltd., Dublin, Ireland) monitor skin integrity after attachment. Cows (...

Reproductive information since 1995 from the USDA national dairy database was used to calculate yearly Holstein and Jersey means for days to first breeding after calving (DFB), 70-d nonreturn rate, conception rate (CR), number of breedings per lactation (NB), interval between first and last breedings during the lactation, days to last breeding after calving (DLB), pregnancy rate (PR), calving i...