since melatonin injections administered near the end of the daily photoperiod influence both gonadal and thyroid hormones in the female hamster , the present study was designed to compare the effects of melatonin and hypothyroidism on the reproductive system and to determine whether thyroid status influenced the action of melatonin on the regulation of the hormones of reproduction .
C0020676
hypothyroidism
C0040132
thyroid