Melatonin
Product
"Low doses of melatonin supplementation can impact fertility. So, doses of 1 to 3 milligrams 30 minutes before you go to bed, can improve your odds of getting pregnant as well, can influence egg quality."
More source quotes
"I take 300 mcgs of melatonin. A third of a milligram. It's to offset the calcification that happens in my pineal gland."
Sleep aid and jet lag
"The one that works is well known is melatonin. You should keep it below 0.5 milligrams otherwise it creates dependency. When you're traveling you can go up to 2 milligrams, but you should stop after 3-4 days."