Day-to-day variations in serum levels of follicle-stimulating hormone and luteinizing hormone in homosexual males.

Levels of follicle-stimulating hormone (FSH), luteinizing hormone (LH), and testosterone in sera of eight homosexual males and a matched control group were determined every second day during one month. Significant day-to-day variations in serum levels of FSH and a reversed LH area/FSH area ratio among homosexuals were found. There were no significant differences between homosexuals and controls in relation to the average levels of the tested hormones nor the average area and variance of LH and testosterone. It is suggested that a single blood sample for each subject is not enough for hormonal evaluation of homosexuals. It is suggested that the present findings may point to some defect in the gonadotropin regulation in male homosexuals.