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Egg donation
Egg donation When a woman, her ovaries stimulated by drugs to produce extra eggs that are then surgically removed, donates her eggs to another woman. Usually done to help an infertile couple get pregnant.
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Ovaries
The paired female sex glands in the pelvis, located one on each side of the uterus. The ovaries produce eggs and hormones including estrogen, progesterone, and androgens.
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Egg sac
The "egg sac" or ovary is one of a pair of reproductive glands in women. They are located in the pelvis, one on each side of the uterus. Each ovary is about the size and shape of an almond. The ovaries have two functions: production of eggs (ova) and female hormones. Each month, during the menstrual cycle, an egg is released from one ovary. The egg travels from the ovary through a fallopian tube to the uterus.
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Embryonic stem cell lines
Populations of dividing cells established from embryonic stem cells and cultured in the laboratory. Within embryonic cell lines are cells that can produce more embryonic stem cells or, under conditions of differentiation, give rise to collections of cells that include most or all cell types that can be found in a postimplantation embryo, fetus, or developed organism.
Epigenetic effects
Changes in gene expression that occur without changing the DNA sequence of a gene; for example, in the epigenetic effect called genomic imprinting, chemical molecules called methyl groups attach to DNA and "turn off" the gene's expression.
Extraembryonic tissues
Intrauterine tissues derived from the zygote that support the embryo(for example, the placenta, the umbilical cord, and membranes such as the amniotic sac).
Edward's syndrome
Congenital condition stemming from a chromosomal abnormality. Symptoms include severe mental retardation and often numerous defects, such as cleft lip and palate, club feet, and malformation of internal organs.
Effacement
The thinning (sometimes called ripening) of the cervix in preparation fordelivery. During effacement, the cervix goes from more than an inch thickto paper thin.
Egg donation
Ejaculate
The fluid emitted from a man's penis that contains sperm.
Electronic fetal monitor
A device that monitors a fetus's progress and vital signs when a woman is in labor. Records the fetal heartbeat and the mother's contractions.
Embryo biopsy
An experimental test for genetic defects in embryos before they are implanted using IVF (in vitro fertilization).
Embryo transfer
An assisted reproductive technology in which an already fertilized egg is inserted into a woman's uterus to help her get pregnant.
Engagement
Engagement, also called lightening or dropping, is when the fetus descends into the pelvic cavity. In first-time mothers, this usually happens two to four weeks before delivery; babies of women who've already had children usually don't engage until labor begins.
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