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Testosterone works in different ways, including direct interaction with its receptor, conversion to other hormones for specific effects on genitalia, hair, bones, and muscle, and changes in body fat and sexual function when low.

Both genetic and hormonal factors are crucial for bird sex differentiation, and disturbances can cause sex reversal.

Hormone therapy for trans individuals is effective and generally safe in the short term.

Rats had lasting erectile problems after stopping a certain medication.

The 2018 update to the ED care model added a new severity score and stressed a detailed evaluation of both physical and psychological aspects.

Ultrasound shows 96% of young men with erectile dysfunction after using finasteride have abnormal penile tissue.

Finasteride treatment may cause erectile dysfunction, but stopping it reverses these effects.

Anabolic-androgenic steroids harm male hormone levels, sperm, metabolism, and can cause acne, hair loss, and breast growth.

Oriental men may have lower androgen activity affecting hair growth despite similar testosterone levels to Caucasian men.

Pediatricians should advise sexually active teens on safe sex and STD prevention, and discuss contraceptive options and their side effects.

A 68-year-old woman developed male traits due to a tumor in her ovary, which was removed, returning her hormone levels to normal.

EndoPump Male Enhancement lacks proven effectiveness and may pose health risks.

A rare ovarian tumor caused early puberty signs in a 1-year-old girl, but surgery reduced hormone levels.

Accurate assessment of puberty using Tanner staging is crucial for identifying normal and abnormal development.

Gender differences affect allergy prevalence, severity, and response to environmental toxins, with women often more affected than men.

Androgens affect the function and health of the endometrium.

Dermatologists should address erectile dysfunction in patients with skin conditions to improve their quality of life.

Hirsutism is abnormal male-pattern hair growth in females due to excess androgens.

Cushing's syndrome can cause serious health problems, and early treatment is crucial, but some issues may remain after treatment.

Mutations in the androgen receptor gene cause androgen insensitivity, leading to female traits in genetically male individuals.

Hair loss in androgenetic alopecia is caused by genetic factors and androgen excess, and can be treated with combined therapies.

Male hormones are important for hair and oil gland development and can cause conditions like excessive hair growth and acne.

Excessive hair growth in women often has no known cause and is not linked to race or other hormonal symptoms.

Understanding how DHT works is important for diagnosing and treating hormone-related disorders.

COVID-19 might affect male fertility, but more research is needed to understand the full impact.

Taking DHEA for a year is generally safe for postmenopausal women but may cause acne and more facial hair without improving metabolism or aging.

Testosterone and dihydrotestosterone affect hair growth, and new techniques like the folliculogram help study it, but fully understanding hair growth is still complex.

We need to learn more about 5α-reductases and neuroactive steroids to safely make drugs targeting these enzymes.

Therapies targeting the androgen receptor are being developed to treat prostate cancer and improve bone and muscle health.

Amenorrhea is when a woman doesn't have periods, with primary amenorrhea starting by age 15 or within five years of breast development, and secondary amenorrhea when periods stop for three months. It affects 3-4% of women not pregnant, breastfeeding, or in menopause, mainly due to polycystic ovary syndrome, hypothalamic amenorrhea, hyperprolactinemia, and ovarian failure.