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The International Glossary on Infertility and Fertility Care

The following glossary was developed in 2017 by a global panel of more than 100 multidisciplinary experts, professional organisations, and patient representatives to provide consensus agreement on 283 items and definitions. Published in Fertility and Sterility (FNS) and Human Reproduction (HR).
A printable version of the 2017 Glossary and more information on the methodology, and a list of previous compiled glossaries can be found here.

Early neonatal death/mortality

Death of a newborn within 7 days of birth.

Ectopic pregnancy

A pregnancy outside the uterine cavity, diagnosed by ultrasound, surgical visualization or histopathology.


Co-ordinated contractions of the genitourinary tract leading to the ejection of spermatozoa and seminal fluid.

Ejaculation retardata

A condition resulting in an inability to ejaculate during vaginal intercourse.

Ejaculatory duct

The canal that passes through the prostate just lateral to the verumontanum where the vas deferens and the duct from the seminal vesicle coalesce.

Elective embryo transfer

The transfer of one or more embryos, selected from a larger cohort of available embryos.

Elective single embryo transfer (eSET)

The transfer of one (a single) embryo selected from a larger cohort of available embryos.


The biological organism resulting from the development of the zygote, until eight completed weeks after fertilization, equivalent to 10 weeks of gestational age.

Embryo bank

Repository of cryopreserved embryos stored for future use.

Embryo donation (for reproduction)

An ART cycle, which consists of the transfer of an embryo to the uterus or Fallopian tube of a female recipient, resulting from gametes that did not originate from the female recipient or from her male partner, if present.
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