Anembryonic gestation: Difference between revisions
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==Overview== | |||
An '''anembryonic gestation''' (''aka'' '''blighted ovum''') is a [[pregnancy]] in which a visible [[embryo]] never develops within a normal-appearing [[gestational sac]], which likely occurs as a result of early embryonic death with continued development of the [[trophoblast]]. | An '''anembryonic gestation''' (''aka'' '''blighted ovum''') is a [[pregnancy]] in which a visible [[embryo]] never develops within a normal-appearing [[gestational sac]], which likely occurs as a result of early embryonic death with continued development of the [[trophoblast]]. | ||
When small, the sac cannot be distinguished from the early normal pregnancy, as there may be a [[yolk sac]], though a [[fetal pole]] is not seen. | When small, the sac cannot be distinguished from the early normal pregnancy, as there may be a [[yolk sac]], though a [[fetal pole]] is not seen. | ||
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==See also== | ==See also== | ||
*[[Ovum]] | *[[Ovum]] | ||
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[[Category:Obstetrics]] | [[Category:Obstetrics]] | ||
[[Category:Pregnancy]] | [[Category:Pregnancy]] | ||
[[es:Gestación anembrionada]] | [[es:Gestación anembrionada]] | ||
[[nl:Windei (miskraam)]] | [[nl:Windei (miskraam)]] | ||
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Revision as of 13:57, 9 August 2011
Template:DiseaseDisorder infobox
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
An anembryonic gestation (aka blighted ovum) is a pregnancy in which a visible embryo never develops within a normal-appearing gestational sac, which likely occurs as a result of early embryonic death with continued development of the trophoblast. When small, the sac cannot be distinguished from the early normal pregnancy, as there may be a yolk sac, though a fetal pole is not seen.
This is one of the causes of miscarriage of a pregnancy.
For diagnosis, the sac must be of sufficient size that the absence of normal embryonic elements is established.
A pregnancy is anembryonic if a transvaginal ultrasound reveals a sac with a mean gestational sac diameter (MGD) greater than 13 mm and no yolk sac, or a MGD >18 mm with no embryo.
Many centers offer mothers a follow-up ultrasound 10 days later to verify diagnosis.
Several management options exist for anembryonic pregnancies which have not miscarried on their own.