Estrogen is a family of hormones that shape breast development, menstrual cycles, vaginal lining, and bone. Estradiol is the one most conversations mean. Levels rise and fall across a month and drop hard after menopause unless replaced.

Sexual effects are indirect and direct. Tissue that is estrogen-supported stays thicker and more easily lubricated. Desire itself is not a simple estrogen dial. Some people feel sharper libido at certain cycle points. Some feel nothing of the kind. Birth control that flattens hormonal swings can change that pattern either way.

Gender-affirming care may include estrogen for trans women and some nonbinary people. That is a supervised medical process, not a salon treatment. Clot risk and monitoring still apply.

Vaginal estrogen in later life can be local and low dose for dryness. It is one of the more practical prescriptions in sexual medicine.