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superfetation |
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superfetation [-fētā′shən] Etymology: L, super + fetus, pregnancy the fertilization of a second ovum after the onset of pregnancy, resulting in the simultaneous development of two fetuses of different degrees of maturity within the uterus. Also called superimpregnation. superfetation the fertilization and subsequent development of an ovum when a fetus is already present in the uterus, a result of fertilization of ova during different ovulatory cycles and yielding fetuses of different ages. superfetation Obstetrics Fertilization and subsequent development of a 2nd ovum after the 1st has already implanted in the uterus; superfetation provides the theoretic explanation for the difference in times of delivery
of fraternal 'twins'. Cf Superfecundation. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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