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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 [soo″per-fe-ta´shun] the fertilization of an ovum and subsequent development of another embryo (fetus) when one is already present in the uterus, a result of fertilization of ova during different menstrual cycles, yielding fetuses of different ages.
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. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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