Ectopic pregnancy
Pregnancy located outside of the uterus, most commonly in a fallopian tube.

Egg
A female reproductive cell, also called an oocyte or ovum.

Egg donation
Donation of an egg by one woman to another who attempts to become pregnant by in vitro fertilization.

Egg Retrieval
Using a needle to puncture the wall of the vagina while a patient is under sedation, the physician enters the ovaries to retrieve the ripened eggs.

Ejaculate
The sperm-containing fluid released at orgasm.

Ejaculatory ducts
The male ducts that contract with orgasm to cause ejaculation.

Electrocautery
Cauterization using electrical current.

Electroejaculation
Controlled electrical stimulation to induce ejaculation I a man with damage to the nerves that control ejaculation.

Embryo
A fertilized egg from conception to the eighth embryologic week.

Embryo Transfer
A procedure in which the physician passes a catheter into the woman’s uterus, discharging the embryos and fluid it holds.

Embryologist
A specialist in embryo development.

Embryology
A specialty focusing on embryo development.

Endocrine gland
An organ that produces hormones.

Endometrial biopsy
Removal of a fragment of the lining of the uterus for study under the microscope.

Endometrioma
A special type of ovarian cyst that is chocolate in color and contains endometrial cells that grow and bleed during menstruation.

Endometriosis
Growth of endometrial tissue outside of its normal location in the uterus.

Endometritis
Inflammation of the endometrium.

Endometrium
The inner lining of the uterus.

Epididymis
The tightly coiled, thin-walled tube that conducts sperm from the testicles to the vas deferens.

Estradiol
The principal estrogen produced by the ovary.

Estrogens
Female sex hormones.