215 citations
,
January 2011 in “Reproductive Biology and Endocrinology” About 7% to 15% of Iranian women have polycystic ovary syndrome, depending on the criteria used to diagnose it.
1 citations
,
September 2016 in “Springer eBooks” Sebum production varies by individual and is influenced by age, gender, and hormones, affecting skin and hair health.
14 citations
,
September 2017 in “Hormones and behavior” δ-GABAA receptors affect alcohol consumption based on the estrous cycle and influence movement regardless of the cycle.
September 2014 in “Springer eBooks” Men and women experience skin aging differently due to changes in sex hormone levels with age.
58 citations
,
December 2020 in “Mayo Clinic Proceedings” 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.
44 citations
,
November 2009 in “Archives of Dermatology” CYLD mutations cause a variety of skin tumors with symptoms starting around age 16, and treatments are currently limited.
6 citations
,
January 2016 in “Annals of Dermatology” Human hair contains more glycosaminoglycans in children than adults, and these compounds decrease with age, possibly affecting hair thickness.
2 citations
,
December 2004 in “Medicine” Different hair and scalp disorders cause hair loss or excess hair growth, with various treatments available depending on the specific condition.
1 citations
,
January 2016 in “Journal of Microbial & Biochemical Technology” The Free Androgen Index (FAI) is the best indicator of early hair loss in men before age 30.
June 2017 in “Experimental dermatology” Skin has a larger surface area than thought, certain skin cells improve skin flap survival, better trials for skin conditions in children are needed, Stevens-Johnson syndrome rates vary by age and race, and better skin barrier function may reduce inflammation in the elderly.
6 citations
,
October 2024 in “npj Digital Medicine” Long-COVID causes more health issues after COVID-19, varying by age, sex, and infection wave.
November 2025 in “International Journal of Research in Medical Sciences” Diffuse alopecia in females is often linked to certain medications, diseases, and low hemoglobin, while female pattern hair loss is linked to age, duration, and family history.
April 2019 in “Journal of Investigative Dermatology” Allergens show specific patterns related to season, gender, and age, which can help in developing allergy avoidance plans.
295 citations
,
September 2006 in “Cell Cycle” The conclusion is that using drugs to block the TOR pathway might slow aging and prevent age-related diseases.
89 citations
,
April 2023 in “Forensic Science International Genetics” Forensic DNA Phenotyping can now better predict appearance, ancestry, and age from DNA, but more research is needed for precise police use.
23 citations
,
June 2017 in “Rejuvenation Research” Minoxidil treatment increases aorta elasticity and reduces stiffness in aged mice, potentially helping with age-related heart issues.
13 citations
,
April 2024 in “International Journal of Molecular Sciences” Loss of the Y chromosome in men is linked to health issues like heart disease and cancer.
10 citations
,
October 2020 in “Frontiers in Cell and Developmental Biology” Wounds can regenerate hair in young mice, but this ability declines with age, offering insights for improving tissue regeneration in the elderly.
1 citations
,
January 2021 in “Skin appendage disorders” Chemotherapy patients don't all lose their hair due to factors like hair growth rates, age, genetics, and the type of drugs used.
172 citations
,
May 2018 in “Nature” Mammalian organs regenerate using stem cells and cell plasticity, but this ability declines with age.
41 citations
,
January 2009 in “International Journal of Trichology” 58% of men aged 30-50 have hair loss, with severity increasing with age.
40 citations
,
December 2011 in “British Journal of Dermatology” Women's hair generally gets thinner and less dense starting in their mid-thirties, with hair loss becoming more common as they age due to both genetics and environment.
34 citations
,
February 2013 in “The Journal of Clinical Endocrinology and Metabolism” Many young Italian women have hyperandrogenic disorders like PCOS, which are linked to age, body weight, and insulin resistance.
30 citations
,
July 2004 in “Fertility and Sterility” 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.
29 citations
,
August 2008 in “Current Opinion in Pediatrics” Hair loss in teenagers is hard to treat and lacks a cure, with some treatments available depending on the type of hair loss.
9 citations
,
January 2016 in “Skin Pharmacology and Physiology” The study concluded that both estrogen and androgen receptors, which decrease with age, are linked to skin aging and may be hormonally regulated.
4 citations
,
May 2011 in “Movement Disorders” A woman's unique dementia was misdiagnosed, a genetic mutation increases Parkinson's risk with age, and finasteride may help with Tourette syndrome.
3 citations
,
September 2025 in “Frontiers in Cardiovascular Medicine” Women with PCOS have a higher risk of heart disease.
1 citations
,
March 2021 in “Dermatological reviews” AGA, a common hair loss, is caused by genetics, hormones, age, and environmental factors.
December 2024 in “International Journal of Molecular Sciences” Human umbilical cord stem cell vesicles may help treat aging and related diseases.