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Metformin helps with menstrual cycles and insulin levels in PCOS but is less effective for hair growth, diabetes prevention, and weight loss, and may improve fertility and reduce diabetes risk.

Women with PCOS may take longer to get pregnant but can have a normal family size, and should manage their overall health to reduce long-term health risks.

Losing weight, fixing varicoceles, and using advanced sperm selection methods improve male infertility treatment outcomes.

Embryonic and adult stem cells are valuable for improving skin grafts and cell therapy.

Disabling the FGF5 gene in sheep leads to longer wool.

Chemicals and stem cells combined have advanced regenerative medicine with few safety concerns, focusing on improving techniques and treatment effectiveness.

Amniotic allograft may be more effective than platelet-rich plasma for midface aging treatment.

Dynamic, light touch is sensed through a common mechanism involving Piezo2 channels in sensory axons.

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

Skin aging reflects overall body aging and can indicate internal health conditions.

Researchers created a mouse with the same mutation as humans with trichothiodystrophy, showing similar symptoms and confirming the condition is due to defects in DNA repair and gene activity.

NcoA4 may have roles beyond helping control gene activity, possibly affecting cell behavior and stability.

The document concludes that while some organisms can regenerate body parts, mammals generally cannot, and cancer progression is complex, involving mutations rather than a strict stem cell hierarchy.

Diet changes can protect against harmful environmental effects on fetal development.

Modified stem cells from umbilical cord blood can make hair grow faster.

Short telomeres contribute to aging and cancer, and while telomerase can delay aging, it may also promote cancer.

Epidermal stem cells help heal severe skin wounds and have potential for medical treatments.

Dermal papillae cells, important for hair growth, come from multiple cell lines and can be formed by skin cells, regardless of their origin or hair cycle phase. These cells rarely divide, but their ability to shape tissue may contribute to their efficiency in inducing hair growth.

Reducing Tyrosinase prevents mature color pigment cells from forming in mouse hair.

Eating isoflavone can help mice grow hair by increasing a growth factor.

Small molecule drugs show promise for advancing regenerative medicine but still face development challenges.