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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.

A genetic region near the PAX1 gene is linked to a higher risk of scoliosis in females.

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.

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

Products should be called 'sperm-safe' only after thorough, well-designed tests.

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

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.

Artificial skin is improving wound healing and shows potential for treating different types of wounds.

Amenorrhea, or the absence of periods, should be evaluated by age 15 or within five years of early breast development, and is most commonly caused by conditions like polycystic ovary syndrome and hypothalamic amenorrhea.

GFP transgenic mice help study cell origins in skin grafts.

Familial factors affect hair loss types in Koreans, with M type in men, L type in women, and paternal factors influencing male hair loss more.

In vivo lineage labelling is better than in vitro methods for identifying and understanding stem cells.

Male pattern baldness involves hormone-related hair thinning, shorter hair, and inflammation.

The mummified girl likely died from undernourishment and illness.