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Higher testosterone levels can increase the risk of certain diseases like type 2 diabetes in women and prostate cancer in men, but can also protect against autoimmune diseases and hair loss. It also affects body fat and bone density.

Four new cases of Bachmann-Bupp syndrome suggest potential for targeted treatment.

Different people show different symptoms for genetic diseases because of how sensitive their bodies are to small changes in important factors.

Decursin shows promise for treating cancer, neuroprotection, inflammation, and hair loss.

Arsenic exposure from contaminated water severely damages the skin, causing hair loss, pigmentation changes, irritation, and can lead to skin cancer.

Certain transcription factors are key in controlling skin stem cell behavior and could impact future treatments for skin repair and hair loss.

Female cuckoo color differences are linked to their unique genes and help avoid male harassment.

Sex neurosteroids cause different effects on hippocampal synaptic plasticity in males and females.

Pattern baldness is likely caused by a dominant gene influenced by testosterone levels, making it more common in men.

Researchers found genes linked to feather growth speed in Shouguang chickens, highlighting two genes that might explain differences in feathering.

Barn owls with smaller black spots have higher testosterone levels, which might be due to genetic effects on hormone regulation rather than hormone effects on coloration.

Finasteride may negatively affect male fertility.

DA-9401 helps protect rat testis from finasteride damage.

5α-Reductase inhibitors can negatively affect male sexual function and, in some cases, significantly reduce sperm count, but these effects may be reversible.

Finasteride may improve sperm count in subfertile men with low sperm count.

Xiangdong black goats have moderate genetic diversity, minimal inbreeding, and important genes for reproduction, immunity, and other traits.

PCOS may be influenced by factors in the blood, not just the ovaries.

The research found specific genes and proteins that affect how fast chickens' feathers grow, which is not solely determined by traditional inheritance patterns.

Loss of the Y chromosome and UTY gene activity increases cancer risk in men.

Men, especially older ones with health issues like prostate cancer, may have worse COVID-19 outcomes and could benefit from therapies targeting male hormones.

The conclusion is that individual differences in COVID-19 severity are influenced by factors like age, sex, race, and genetics, which are important for personalized medicine.

New genetic locations explain much of hair color variation in Europeans.

Men may be more vulnerable to severe COVID-19 due to genetic and hormonal factors, but more research is needed.

Male hormones like testosterone may make COVID-19 worse, and testing for sensitivity to these hormones could help predict how severe a patient's symptoms might be. Treatments that reduce these hormones are being explored.

Baldness in men with prostate cancer is linked to higher levels of certain sex hormones, but chest hair density is not.

Two mouse mutations cause similar hair loss despite different skin changes.

Methotrexate side effects vary by race and sex.

Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.

Cancer rates are increasing in developed countries, with estrogen, aging, low vitamin D3, and HPV infection as common causes.