Androgenetic alopecia Overview Androgenetic alopecia is a common, genetically determined form of gradual hair loss driven by sensitivity to male sex hormones like dihydrotestosterone (DHT). Symptoms General Signs Gradual onset: Hair loss develops slowly over years.No pain or itching: The scalp usually feels normal without redness, scaling, or irritation. Hair miniaturization: Thick strands slowly turn into thin, short, wispy peach fuzz. Symptoms in Men Receding hairline: Hair starts pulling back at the temples. M or U shape: The hairline forms a distinct "M" or "U" shape. Crown thinning: Hair thins or forms a bald spot at the top back of the head (vertex).Symptoms in Women Widening part: The center part in the hair gets broader over time.Preserved hairline: The front hairline usually stays in place. Diffuse thinning: Volume decreases across the top of the head rather than creating smooth bald spots. Causes Hormones (DHT): An enzyme called 5-alpha-reductase conv...
Androgen Insensitivity Syndrome What Is Androgen Insensitivity Syndrome? Androgen insensitivity syndrome (AIS) is a rare condition that affects sexual development. It occurs when someone is genetically male, but their body doesn’t respond to male sex hormones called androgens. This results in a person having male sex chromosomes (one X and one Y chromosome) but not having male genitals. AIS affects males during fetal development and during puberty. AIS was previously called testicular feminization syndrome. AIS happens due to genetic mutations, which are changes to genes that affect how they function. With AIS, the gene mutation prevents male genitals from developing in people who are genetically male. AIS almost always results in infertility. Receiving an AIS diagnosis for yourself or your child can be difficult. The condition isn’t life-threatening, but people with AIS may struggle with gender identity or have concerns about their body image. It’s helpful to have a supportive network...