Abstract
The lizard Anolis carolinensis exhibits asymmetric ovarian growth. At any given time, the larger ovary (LO) contains a larger follicle than does the smaller ovary (SO). Physiologically hypophysectomized females with quiescent ovaries were treated with gonadotropin (ovine FSH) or saline vehicle after either surgical removal of the LO or sham operation. The smaller ovaries of initial control, sham-operated, and hemiovariectomized (HO) females were similar in weight and follicular size. Therefore, endogenous gonadotropin secretion remained at subthreshold levels during the experiment and after HO. FSH significantly stimulated ovarian follicular growth in both sham-operated and HO females. However, the response of the SO of HO females to FSH was significantly greater than that in shamoperated females. These results demonstrate a greater sensitivity of the SO to FSH if the LO is absent.
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