Progesterone is involved in the production of other adrenal hormones, including cortisol, testosterone and estrogen. Progesterone regulates ovulation in females, and sperm production and sexual behaviour in males. Progesterone imbalances can cause infertility, weight gain, low sex drive and depressive symptoms.
Testosterone controls the development of typical male features (e.g., deep voice, face and body hair, muscle bulk) and male fertility. Abnormally low levels of testosterone can decrease sexual performance, muscle and bone strength, and increase fatigue and depression.
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