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Medical treatments like chemotherapy and radiotherapy can harm sperm production, so freezing sperm before treatment is important for men who want children later.

Lgr5 is a marker for active, long-lasting stem cells in mouse hair follicles.

Fat-related cells are important for initiating hair growth.

The enzyme steroid sulfatase is linked to breast cancer and other conditions, and inhibitors are being developed for treatment.

The Rotterdam Study updated findings on elderly health, focusing on heart disease, genetics, lifestyle effects, and disease understanding.

EZH1 and EZH2 are crucial for healthy hair growth and skin repair.

Hair loss needs more research for better treatments.

Wnt signaling controls whether hair follicle stem cells stay inactive or regenerate hair.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

Minoxidil and finasteride effectively treat hair loss.

Amenorrhea is relatively rare and initial testing should check FSH, TSH, and prolactin levels.

Researchers created a fully functional, bioengineered skin system with hair from stem cells that successfully integrated when transplanted into mice.

Fetal skin cells from a cell bank heal wounds faster and with less scarring than adult cells.

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.

The document concludes that for hair and feather growth, it's better to target the environment around stem cells than the cells themselves.

Human hair follicle cells can grow hair when put into mouse skin if they stay in contact with mouse cells.

Human skin cells can create new hair follicles when transplanted into mice.

The document concludes that future heart disease research should account for sex-specific differences to improve diagnosis, treatment, and outcomes.

The research suggests that the global distribution of PCOS is likely due to historical human migration and that genes affecting PCOS may have different impacts on males and females.

Bone marrow and umbilical cord stem cells can help grow new hair.

Beard and scalp hair cells have different gene expressions, which may affect beard growth characteristics.

PFS and PSSD are similar conditions with persistent sexual dysfunction after stopping medication.

Fetal cells could improve skin repair with minimal scarring and are a potential ready-to-use solution for tissue engineering.

Genetic differences affect COVID-19 severity and treatment development.

The document concludes that identifying the cause of amenorrhea is crucial for proper treatment.

Cells from a skin condition can create new hair follicles and similar growths in mice, and a specific treatment can reduce these effects.

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

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.

Certain human skin cells marked by CD44 and ALDH are rich in stem cells capable of long-term skin renewal.

Female donor to male recipient sex mismatch and positive ACA-IgG are key risk factors for vitiligo and alopecia areata in chronic GvHD patients.