Some Pituitary-ovarian Relationships in the Periparturient Cow.

Macromineral physiology and application to the feeding of the dairy cow for prevention of milk fever and other periparturient mineral disorders

The periparturient cow undergoes a transition from non-lactating to lactating at calving. The animal is tremendously challenged to maintain calcium homeostasis. Those that fail can develop milk fever, a clinical disorder that is life threatening to the cow and predisposes the cow to a variety of other disorders. Less dramatic sub-clinical hypocalcemia can also reduce productivity of cattle by r...

Advancing parity is associated with high milk production at the cost of body condition and increased periparturient disorders in dairy herds

The objectives of this study were to determine the effects of parity on milk production, body condition change, periparturient health, and culling in Korean dairy herds. The data utilized included; milk yield, body condition score, cow parity, calving condition, periparturient disorders, culling, and reproductive status, which were recorded from 1290 calvings in eight dairy herds. The mean milk...

Sulpiride-Induced Hyperprolactinemia in Mature Female Rats: Evidence for Alterations in The Reproductive System, Pituitary and Ovarian Hormones

Physiology and Management of the Postpartum Suckled Cow for Controlled Breeding Programs

After an approximate 30-d period of uterine repair and involution, the resumption of normal postpartum ovarian cycles is regulated mainly by the rate of recovery of the hypothalamic-pituitary axis. Mechanisms controlling the re-initiation of patterns of LH secretion that are needed to support follicular development and ovulation include physiological recovery of the pituitary from effects of hi...

Metabolic responses of adipose tissue in the periparturient dairy cow