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Two experiments were done to test the hypotheses that aging in cattle is associated with a reduced number of follicles recruited into an ovarian follicular wave, and a reduction in the ovarian response to gonadotropin treatment. Older cows (13–16 years of age) and their daughters (3–6 years of age) were treated with FSH for ovarian superstimulation four times over two consecutive years (31 and 33...
The responsiveness of the hypothalamo-pituitary axis to steroid treatments for ovarian synchronization and the ovarian superstimulatory response to exogenous FSH was compared in 13–14 year old cows and their 1–4 year old young daughters. We tested the hypotheses that aging in cattle is associated with: (1) decreased follicular wave synchrony after estradiol and progesterone treatment; (2) delayed...
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