Check this out (couldn't decide which section to put it in)

[Andro9]

i take melatonin to help me sleep. what do you guys think of this? do you think maybe it applies to males? i could not find any info on males

[55] One study reported that three mg of melatonin taken in the evening raised prolactin levels in six out of seven women.[56] Melatonin also lowers FSH levels. It is believed that these hormonal changes could in some women impair fertility.[1]


works cited:
55.^ "Melatonin". About.com: Sleep Disorders: 4.
56. Terzolo M, et al., 1993."Evening administration of melatonin enhances the pulsatile secretion of prolactin but not of LH and TSH in normally cycling women." Clinical Endocrinology, 39(2):185-191.
1.http://www.sleepdex.org/melatonin.htm

[Little Herc]

Hmm,
I mean....I don't think you have anything to worry about in the fertility dept since you are a guy right? Unless it makes your salmon quit swimming upstream but I been taking it for years and....wait no kids hmmm

[spywizard]

Prolactin is never a good thing..

I can't take it every night.. if you have to take it every night you should find something else that works and cycle the 2..