The androgen hormone testosterone is secreted in the adrenal glands and ovaries in women and in the adrenal glands and testes in men. The hormone is closely related to optimal sexual performance in both men and women.

Hormones such as progesterone, produced by the corpus luteum, the leftover "shell" of the follicle that contained the ovulated egg, play a crucial role in maintaining a pregnancy. One sign of inadequate progesterone levels is a short luteal phase, or luteal phase defect, after ovulation.

Most women will have an irregular menstrual cycle at some point in their reproductive years. Menstrual irregularities can begin at puberty or when a woman’s reproductive years come to an end, nearing menopause.

Steroid eye drops are used to treat a variety of conditions that include everything from dry eyes to arthritis flare-ups in the eye. Steroids mimic a naturally occurring substance in the body called cortisol that reduces inflammation in eye disease and prevents scarring after eye injuries or surgeries.

Estrogen is a hormone that is produced by a woman's ovaries. Throughout your life, your estrogen levels will rise and fall. Hair growth accelerates as estrogen levels increase, while later in life you may experience hair loss as estrogen levels drop.

Cortisol is a hormone produced by the human body, designed to help the body deal with mental and physical stress. Also known as the "stress hormone," cortisol increases in the blood rise as an individual feels either physical, emotional or mental stress.

Most testosterone boosting supplements include D-aspartic acid, often listed as DAA or D-asp, as the first ingredient. There is some debate as to whether or not D-aspartic acid is effective. D-aspartic acid is not intended to be used by people under 21 years of age.

Estrogen is the term used to describe a group of essential steroid sex hormones present in both men and women. Although estrogen has no known functions in men, it is essential for women. Estrogen promotes the development of the female sexual organs and supports a healthy reproductive system.

Exercise has been proven to have an impact on estrogen levels in women, but the type and level of impact varies from woman to woman. Depending on your fitness level, age and stage in life, your exercise routine may or may not impact your estrogen levels.

Besides the more publicized use of testosterone to increase muscle mass for weightlifters, athletes and body builders, testosterone is also given for maladies like hypogonadism (a hormonal imbalance resulting in low sex drive and low sperm production) in men and for birth control with women.

Steroid eye drops are prescribed to treat eye infections, reduce inflammation and relieve dry eye. But their use is not without potentially harmful side effects. Steroid eye drops can sting your eyes or cause vision changes or reduce your eyes' ability to fight infection.

Cortisol is a hormone secreted by your adrenal glands in the wee hours of the morning. Cortisol also is known as the "stress hormone" due to its ability to help you adapt during stressful "fight-or-flight" situations.