Alterations of reproductive hormones and receptors of male rats at the winter and summer solstices and the effects of pinealectomy.
BACKGROUND: Photoperiodic changes mediate certain physiological or pathological alterations in organisms. Solstices represent either the longest or shortest photoperiod of a year.
OBJECTIVES: Intact and pinealectomized rats were used to investigate the potential changes of reproductive hormones in the hypothalamu.....