Ectopic pregnancy
A pregnancy in the fallopian tube or elsewhere outside the lining of the uterus.
Egg (oocyte)
The female sex cell (ovum) produced by the ovary, which, when fertilized by a male’s sperm, produces an embryo.
Egg retrieval
The procedure in which eggs are obtained by inserting a needle into the ovarian follicle and removing the fluid and the egg by suction. Also called oocyte aspiration.
Electroejaculation (EEJ)
Procedure to cause ejaculation of sperm, performed by electrical stimulation of tissue in the region of the prostate.
Embryo
A fertilized egg that has begun cell division.
Embryo culture
Growth of the embryo in a laboratory (culture) dish.
Embryo transfer
Placement of an embryo into the uterus or, in the case of ZIFT and TET, into the fallopian tube.
Endometriosis
A disease in which tissue resembling endometrium (the lining of the uterus) grows outside the uterus. It is often associated with infertility.
Epididymis
The duct between testes and vas deferens where sperm are stored and mature.
ESHRE
European Society of Human Reproduction and Embryology.
Estradiol
The predominant estrogen (hormone) produced by the follicular cells of the ovary.
Estrogen
The female hormone largely responsible for thickening the uterine lining during the first half of the menstrual cycle in preparation for ovulation and possible pregnancy. Estradiol is the main estrogen.