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Men with low or no sperm count have lower salivary testosterone levels, and saliva testing can measure their testosterone well.

Testosterone is key for male sexual function, and treating hormone imbalances can improve sexual issues.

Testosterone in older women can increase bone density, muscle mass, fat mass, improve memory, and boost libido, but may cause nipple color changes.

Equilibrium dialysis can accurately measure testosterone levels when lab results are inconsistent.

Gonadal hormones may influence sex differences in play fighting in animals, but their effect on human spatial behavior is unclear and needs more research.

Testosterone and its byproducts help support male sexual behavior through different pathways in the brain and body.

Fertility-preserving surgery can help women with early-stage Sertoli-Leydig cell tumors conceive naturally.

Testosterone boosts physical performance, grip strength, and lean body mass in older men with low testosterone.

SHH protein helps nerve regeneration in hypertensive rats.

Leydig cell tumors can cause high testosterone in women and are treated by removing the ovaries.

Men with low testosterone or breast growth should be checked for Cushing syndrome.

Testosterone affects skin by increasing oil production and influences hair growth.

Oophorectomy lowers testosterone and estrogen levels in both premenopausal and postmenopausal women, with postmenopausal women still producing significant testosterone.

A woman's male-like symptoms and high testosterone were due to ovarian hilus-cell hyperplasia, which improved after surgery.

Exposure to low doses of finasteride in the womb causes changes in the prostate of both male and female gerbils.

A rare ovarian tumor can occur without causing male-like symptoms.

Certain adrenal hormones can strongly stimulate oil gland growth in hamster skin, similar to male hormones.

Androgens like testosterone affect hair growth and oil production differently across body parts and individuals.

Testosterone is vital for male health, and its deficiency is linked to aging and common health issues.

Parental support and gender-affirming care are crucial for the mental health of transgender adolescents.

A rare ovarian tumor caused high testosterone, hair loss, and missed periods, but surgery fixed these issues and led to pregnancy.

Young and adult hamsters both respond similarly to testosterone and finasteride treatments, but young hamsters aren't good for testing the inhibitory activity of a specific enzyme.

Androgen levels can increase at any age, affecting symptoms like acne, hair loss, and prostate size.

The document explains how the male reproductive system works, its role in making testosterone, and how conditions like obesity can disrupt it, leading to low testosterone and fertility issues.

Long-term finasteride use may affect sperm structure and chromosomes.

Finasteride doesn't change polycystic ovary size or cyst number, suggesting testosterone's role in their appearance.

Using testosterone-stimulated weanling rats can effectively replace castrated rats for anti-androgen testing, reducing animal stress.

Finasteride changes hormone levels and certain proteins in rats, but these effects can be reversed after stopping the drug.

Testosterone replacement therapy, especially intramuscular, raises PSA levels, but no overall link between PSA and testosterone was found except in non-BPH patients.

The document explains how male reproductive hormones work and affect the body.