Estrogen

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Estrogen is a female sex hormone. It helps women grow during puberty and is part of the menstrual cycle. During menopause, estrogen levels go down. The male hormone that is similar is testosterone.

Human reproductive system

Female anatomy	Breasts – Cervix – Clitoris – Clitoral hood – Fallopian tubes – Bartholin's glands – Gräfenberg spot (G-spot) – Hymen – Labia – Ovaries – Skene's glands – Urethra – Uterus – Vagina – Vulva

Female physiology	Ejaculation – Estrogen – Orgasm – Ovum

Male anatomy	Bulbourethral glands – Corpus cavernosum – Ejaculatory ducts – Epididymis – Foreskin – Frenulum – Glans penis – Penis – Prostate – Rete testis – Scrotum – Seminal vesicles – Seminiferous tubules – Sertoli cell – Spermatic cord – Testicles (testes) – Urethra – Vasa deferentia

Male physiology	Ejaculation – Erection – Orgasm – Semen – Sperm – Testosterone

Anatomy is the study of the parts of the body • Physiology is the study of how the body works

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Hormones

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