Testosterone is a vital sex hormone produced by the human body. For men, it’s a primary sex hormone produced in the testicles. However, women’s ovaries and adrenal glands also produce trace amounts of testosterone.

Sperm—and sperm health—is a critical part of fertility. However, sperm tends to get a lot less coverage than other issues involving fertility. It’s time to give sperm some air time! (not literally, of course. Sperm doesn’t do so well in the air…)

While it’s possible that overnight erections come from a particularly exciting dream, morning erections are more commonly caused by hormonal changes during the sleep cycle.