September 2024 in “International Journal of Molecular Sciences” High doses of testosterone disrupt hormone levels and receptor expression in the uterus, affecting fertility.
25 citations
,
September 2014 in “Pharmacotherapy” Hormone therapy can improve mental health and quality of life for people with gender dysphoria, but long-term effects need more research.
October 2025 in “Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)” Hormone therapies improve mental health and quality of life for those with gender dysphoria.
204 citations
,
May 2014 in “The Journal of Sexual Medicine” Hormone therapy for trans individuals is effective and generally safe in the short term.
9 citations
,
July 2023 in “Hypertension” Gender-affirming hormone therapy may increase heart disease risk in transgender individuals.
April 2015 in “The FASEB Journal” Blocking androgens at birth reduces sexual motivation in male rats.
Cyproterone slightly inhibited hair growth in castrated mice, while tamoxifen significantly inhibited hair growth in castrated mice but not in normal mice.
January 2018 in “Elsevier eBooks” 5α-reductase-2 deficiency causes ambiguous genitalia at birth and affects male sexual development, but individuals often develop male characteristics at puberty.
September 2025 in “Medicine & Science in Sports & Exercise” Gender-affirming hormone therapy and surgery affect gut bacteria differently.
November 2022 in “Journal of the Endocrine Society” A transman experienced lasting virilization symptoms after stopping testosterone, which were resolved with estradiol treatment.
32 citations
,
September 2011 in “Journal of Neuroendocrinology” Inhibiting 5α-reductase during late pregnancy shortens gestation, reduces litter size, and harms memory in rat offspring.
19 citations
,
June 2006 in “Physiology & Behavior” Finasteride slows down motherly behavior in first-time pregnant rats.
105 citations
,
June 2010 in “The journal of sexual medicine” Testosterone undecanoate increases lean mass and causes various physical changes in female-to-male transsexuals.
August 2020 in “DOAJ (DOAJ: Directory of Open Access Journals)” Finasteride, at doses of 5mg or higher, may negatively affect male fertility by reducing the expression of certain genes involved in sperm production.
January 1983 in “Elsevier eBooks” Masculinization in affected individuals occurs gradually after puberty due to hormone changes.
Finasteride affects prostate development differently in male and female Mongolian gerbils.
157 citations
,
May 2016 in “Plastic and reconstructive surgery/PSEF CD journals” Facial feminization surgery is safe and patients are satisfied, but more detailed research is needed.
3 citations
,
March 2022 in “Transgender Health” More research is needed to improve lower body gender affirmation techniques.
60 citations
,
June 2007 in “Pharmacology Biochemistry and Behavior” Blocking progesterone metabolism can cause depression-like behavior in mice.
26 citations
,
November 1993 in “Progress in Neuro-psychopharmacology & Biological Psychiatry” Treatment during development affects hormone balance and sexual behavior in male rats.
168 citations
,
January 2005 in “Journal of Investigative Dermatology” Male and female mice have different skin thickness, and hormones affect their skin and hair growth differently.
January 2024 in “JEADV clinical practice” Gender-affirming dermatology treatments generally improve mental well-being for transgender individuals, but more research is needed.
17 citations
,
September 2013 in “The International Journal of Neuropsychopharmacology”
11 citations
,
January 2017 in “Journal of Endocrinology/Journal of endocrinology” Female mice with disrupted 5α-reductase 1 had significant metabolic issues, including stress response problems, insulin resistance, liver fat buildup, and obesity.
May 2019 in “bioRxiv (Cold Spring Harbor Laboratory)” Testosterone significantly affects urination differences between male and female mice.
5 citations
,
September 2022 in “Facial Plastic Surgery & Aesthetic Medicine” Facial feminization surgery helps make facial features more feminine, improving patient satisfaction and safety.
32 citations
,
July 2017 in “Clinical and Experimental Dermatology” Finasteride effectively treats hair loss in transgender men with few side effects.
98 citations
,
July 1983 in “Journal of Steroid Biochemistry” Individuals with this condition often develop male traits and identities at puberty despite being raised as females.
41 citations
,
November 2003 in “Annals of the New York Academy of Sciences” Male hormones, or androgens, affect women's health in areas like mood and bone density, and hormone replacement therapy using antiandrogenic progestogens can improve mood disorders and alertness in menopausal women.
118 citations
,
May 2003 in “Toxicological Sciences” Exposure to finasteride in the womb caused lasting reproductive issues in male rats.