Pregnancy is a dynamic state associated with a number of hormonal changes. Present study reports the effect of pregnancyand parturition on body hair growth in dairy cattle. For this purpose Holstein Friesian cows, three early pregnant and twopost-parturition were used. The hairs samples from neck, thoracic and back areas were collected twice a week for a periodof two months to measure hair weight and the diameter. An increase in hair diameter and weight with advancing days ofpregnancy was observed, whereas the hair weight decreased after parturition. In pregnant cows, a persistent increase ofdiameter and weight along the individual fibers from tip to end was observed. Furthermore, a similar pattern of increase inweight and diameters was also observed for the neck thoracic and back hairs. A positive and significant correlationbetween hair fiber diameter and weight was observed in pregnant cows. These results indicated that the hair growth is affected by the pregnancy status in dairy cattle.
|Workshop||The Journal of Animal and Plant Sciences|
|Period||21/11/11 → 23/11/11|