A journey back to the first nine months of your life ...

From the sea horse that mates in an hypnotic underwater ballet to the rodent who copulates until he literally drops dead, THE NATURE OF SEX spans the globe to illustrate how an astonishing diversity of life forms find their mates and conceive, raise, and protect their offspring.

Reproductive Physiology, Conception, Prenatal Development The reproductive cycles of sexually-reproducing animals are influenced by a number of hormones, including follicle-stimulating hormone, leutinizing hormone, estrogen, testosterone, and progesterone, produced by the animals bodies. Additionally, reproductive cycles are influenced by environmental factors such as day length. Since the ...