Effect of mating on plasma levels of LH and progesterone in montane voles (Microtus montanus)

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Abstract
Mating significantly increased plasma LH [luteinizing hormone] in males and females (P < 0.01). In the males, the increase was relatively small, and the LH concentration for 1 of the 6 mated animals was within the range of values for unmated males. Mating also significantly increased plasma progesterone levels in females (P < 0.01). Progesterone concentrations were significantly higher (P < 0.05) in estrous unmated females than in diestrous females. The increases in plasma LH and progesterone concentrations of females 1 h after mating are presumably involved in the ovulatory process. LH serves to trigger ovulation.

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