A person or couple who receives donated eggs, sperm or embryos for the purposes of initiating a pregnancy with the intention of becoming a legally recognized parent.

An ART cycle in which a woman receives zygote(s) or embryo(s) from donor(s) or a partner.

The spontaneous loss of two or more clinical pregnancies prior to 22 completed weeks of gestational age.

Surgical procedures performed to diagnose, conserve, correct and/or improve reproductive function in either men or women. Surgery for contraceptive purposes, such as tubal ligation and vasectomy, are also included within this term.

A condition that causes the semen to be forced backward from the ejaculatory ducts into the bladder during ejaculation.

The surgical removal of an entire Fallopian tube.

A nodular thickening of the proximal Fallopian tube (where the tubes join the uterus), which can distort or occlude the tubes and increase the risk of ectopic pregnancy and infertility.

A surgical procedure in which an opening is made in the Fallopian tube either to remove an ectopic pregnancy or open a blocked fluid-filled tube (hydrosalpinx).

A woman unable to establish a clinical pregnancy but who has previously been diagnosed with a clinical pregnancy.

A condition in a person with a child wish, who has previously delivered a live child, or is or has been a legal or societally-recognized parent to a child. A major cause of secondary involuntary childlessness is infertility.

A man who is unable to initiate a clinical pregnancy, but who had previously initiated a clinical pregnancy.

A description of the ejaculate to assess function of the male reproductive tract. Characteristic parameters include volume, pH, concentration, motility, vitality, morphology of spermatozoa and presence of other cells.

The process whereby proteolytic enzymes degrade proteins causing seminal plasma to liquefy.

The description of the relative fluidity of seminal plasma.

The amount of fluid in an ejaculate.

The fluid at ejaculation that contains the cells and secretions originating from the testes and sex accessory glands.

The fluids of the ejaculate.

The non-germinal cell type in the seminiferous tubule that mediates the actions of testosterone and FSH in the testis, provides nutrients and proteins to the developing spermatogenic cells, creates the blood-testis barrier, and secretes Mullerian-inhibiting hormone.

A condition in which only Sertoli cells line the seminiferous tubules with usually a complete absence of germ cells; also referred to as germ cell aplasia. Spermatogenesis in isolated foci can be observed in rare cases.

A systemic response as a result of ovarian stimulation interventions that is characterized by severe abdominal discomfort and/or other symptoms of ascites, hemoconcentration (Hct > 45) and/or other serious biochemical abnormalities requiring hospitalization for observation and/or for medical intervention (paracentesis, other).