This book covers human female biology, how the menstrual cycle is controlled, how steroidogenesis is controlled and how the follicle and the egg are formed. This book covers male biology, and how steroid hormones are made, and how sperm are synthesized and matured. Then this book covers sex biology, such as how the brain deals with libido and sexual images, and how the brain controls erection and ejaculation. This book deals with how sperm are matured upon intercourse, how fertilization takes place, and how the fertilized embryo is matured and implants in the uterus. The subjects of sexuality and homosexuality, chromosome disorders and hydatidiform moles are carefully discussed and considered. Sexual maturation of the fetus during pregnancy is carefully considered. This book carefully describes puberty, adrenarche and menarche. The subject of menopause is carefully considered. The subject of major bacterial and viral and sexual diseases is carefully considered as is the subject of reproductive cancers. In writing this book, care has been taken to update everything and check out the information available on medline and on the internet.This is a textbook for undergraduates, medical students and graduates describing all the details of human reproduction. It is also the only up-to-date book on the market. Having examined a total 70 books on human reproduction, obstetrics and gynecology, they all, with no exceptions, include mostly out-of-date science. This is corrected in this book. This book is also a monograph for reproductive biology scientists, covering all the most recent findings in this field. It can also be sold as a general obstetrics and gynecology information source for use by physicians, the general public and in libraries. This is a unique one-of-a-kind reference on human reproduction