Background: In many mammals, the duration of the nocturnal melatonin elevation regulates seasonal changes in reproductive hormones such as luteinizing hormone (LH). Melatonin's effects on human ...

A luteinizing hormone (LH) test measures how much luteinizing hormone a person has in their blood. This is a hormone with key roles in both male and female reproductive systems. Luteinizing hormone ...

This review analyzes nearly three decades of research on menstrual cycle phases and their inconsistent effects on women's ...

The 20 participants completing the study had a mean age of 59 years (range 51–69). As expected due to random group assignment, baseline values of urinary LH excretion among the 3 groups were not ...