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Ectopic Pregnancy is the kind of pregnancy, when the fertilized egg gets implanted somewhere outside the uterine cavity. Most often it is implanted in one of the fallopian tubes (tubal pregnancy).

Embryo is the term, which is used to describe the inner cells of a fertilized oocyte, from which a fetus begins to develop.

Embryo Cryopreservation
is called the procedure, during which embryos keep preserved by freezing.

Embryo Donation takes place in case if a couple fails to produce healthy embryo. The doctors proceed with IVF, using the embryos, which are created by donated oocytes and sperm.

Embryologist
is a scientist, specializing in assisted reproduction and is expertly trained in dealing with oocytes, sperm and embryos.

Empty Sella Syndrome
is a kind of condition, when spinal fluid leaks into the bony chamber (fossa), where the pituitary gland is located. The pressure of this fluid compresses the pituitary gland, and may affect its ability to secrete LH and FSH, as well as it may elevate the prolactin hormone levels.

Endocrinology
is the study of hormones, the ways they are produced and work, as well as the organs, producing them.

Endometriosis is called the presence of endometrial tissue in any abnormal for it locations, like the ovaries, fallopian tubes of the abdominal cavity. This is the condition, which may cause feelings of pain and discomfort during the menstruation process. It is also possible that a woman, who suffers from endometriosis may have chronic pain in her pelvic area. 

Endometrium
is called the mucus membrane, which is lining the uterus.

Epididymis
is the part of the genital tract of a male, which is situated next to the testis, where the maturation of the sperm gets accomplished partially. Epididymus receives the sperm from the testis and continues as the Ducus Deferens.

Estradiol
is the main hormone, which the growing ovarian follicle produces.

Estrogen
is called the primary female hormone, which is produced by her ovaries, beginning with the puberty period up until menopause.