(CAIS)

Complete Androgen Insensitivity Syndrome is a condition that effects sexual development before birth and during puberty. It occurs when the body cannot use androgens at all. People with this form of the condition: Androgen insensitivity syndrome are genetically male, with one X chromosome and one Y chromosome in each cell, but their bodies are unable to respond to certain male sex hormones, making them immune to Testosterone, thus they are only affected by Estrogen.
This causes them to have the external sex characteristics of females, but they do not have a uterus and therefore do not menstruate and are unable to conceive children. People with complete androgen insensitivity syndrome also have sparse or absent hair in the pubic area and under the arms.
Affected individuals have male internal sex organs (testicles) that are undescended, which means they are abnormally located in the pelvis or abdomen. Undescended testes have a small chance of becoming cancerous later in life if they are not surgically removed.
Boys with this condition are typically raised as females and have a female gender identity.