Reproductive biology includes both sexual and asexual reproduction.

Reproductive biology includes a wide number of fields:

Human reproductive biology is primarily controlled through hormones, which send signals to the human reproductive structures to influence growth and maturation. These hormones are secreted by endocrine glands, and spread to different tissues in the human body. In humans, the pituitary gland synthesizes hormones used to control the activity of endocrine glands.

Internal and external organs are included in the reproductive system. There are two reproductive systems including the male and female, which contain different organs from one another. These systems work together in order to produce offspring.

The female reproductive system includes the structures involved in ovulation, fertilization, development of an embryo, and birth.

These structures include:

Estrogen is one of the sexual reproductive hormones that aid in the sexual reproductive system of the female.

The male reproductive system includes testes, rete testis, efferent ductules, epididymis, sex accessory glands, sex accessory ducts and external genitalia.