Period of rapid growth and sexual maturation during which the reproductive system becomes fully functional.
Principal male sex hormone that stimulates the development of many male sex characteristics.
Structure in the male reproductive system attached to the seminiferous tubules in which sperm mature and are stored.
Substance in which sperm are suspended that is produced by three glands in the abdominal cavity.
External male reproductive organ; the organ through which the urethra connects to the outside of the body in humans and certain other animals
One of two fluid-filled tubes in human females through which an ovum passes after its release from an ovary; location of fertilization.
ORgan lying between the Fallopian tubes and the vagina in which a fertilized ovum can develop.
Period after which follicle development no longer occurs and a female is no longer capable of bearing a child.
Process that involves the development and release of an egg for fertilization and the preparation of the uterus to receive a fertilized egg.
Last phase of the menstrual cycle during which the lining of the uterus along with blood and the unfertilized ovum are discharged through the vagina.
Solid ball of cells that make up an embryo; in humans, this stage occurs four days after fertilization.
Hollow structure in early human embryonic development that results after the morula form a fluid-filled cavity in the center.
Process in early embryonic development in which the blastocyst attaches itself to the wall of the uterus and begins to grow inward.
Process of cell migration during which the primary germ layers are formed in an embryo.
Membrane that surrounds and protects a developing embryo; in placental mammals such as humans, develops into the amniotic sac.
Outermost membrane surrounding a developing reptile, bird, or mammal embryo; forms the placenta in placental mammals.
Organ in placental mammals through which nutrients, oxygen carbon dioxide, and wastes are exchanged between embryo and mother.
Unborn young of an animal during the later stages of development; in humans, the name give to embryo after eight weeks of development.
fluid-filled structure that cushions and protects the developing fetus in placental mammals such as humans.