Blighted ovum - wikipedia Blighted ovum Anembryonic gestation Transvaginal ultrasonography showing a gestational sac with a diameter of 28 mm, corresponding to a gestational age of approximately 7 weeks and 5 days. It contains a yolk sac ( protruding from its lower part ) but no embryo, even after scanning across all planes of the gestational sac, thus being diagnostic of an anembryonic gestation. Classification and external resources Specialty obstetrics ICD - 10 O02. 0 ICD - 9 - CM 631 ( edit on Wikidata ) A blighted ovum or anembryonic gestation ( anembryonic pregnancy ) is a pregnancy in which the embryo never develops or develops and is reabsorbed. It typically results in a miscarriage. In a normal pregnancy, an embryo would be visible on an ultrasound by six weeks after the woman 's last menstrual period. Anembryonic gestation is one of the causes of miscarriage of a pregnancy. A blighted ovum or anembryonic gestation is characterized by a normal - appearing gestational sac, but the absence of an embryo. It likely occurs as a result of early embryonic death with continued development of the trophoblast. When small, the sac can not be distinguished from the early normal pregnancy, as there may be a yolk sac, though a fetal pole is not seen. For diagnosis, the sac must be of sufficient size that the absence of normal embryonic elements is established. The criteria depends on the type of ultrasound exam performed. A pregnancy is anembryonic if a transvaginal ultrasound reveals a sac with a mean gestational sac diameter ( MGD ) greater than 25 mm and no yolk sac, or an MGD > 25 mm with no embryo. Transabdominal imaging without transvaginal scanning may be sufficient for diagnosing early pregnancy failure when an embryo whose crown -- rump length is 15 mm or more has no visible cardiac activity. See also Ovum Products of conception References Jump up ^ Kim Mackenzie - Morris. `` What is a blighted ovum ? ''. Babycentre.co.uk. Retrieved 19 December 2013. Jump up ^ `` Blighted Ovum : Symptoms, Causes and Prevention ''. American Pregnancy Association. 2012 - 04 - 26. Retrieved 2017 - 09 - 09. Jump up ^ `` Blighted ovum : What causes it ? ''. Mayo Clinic. Retrieved 2017 - 09 - 09. Jump up ^ Hoffman, Barbara ( 2012 ). Williams gynecology. New York : McGraw - Hill Medical. p. 171. ISBN 9780071716727. Jump up ^ Campion, Edward W. ; Doubilet, Peter M. ; Benson, Carol B. ; Bourne, Tom ; Blaivas, Michael ( 10 October 2013 ). `` Diagnostic Criteria for Nonviable Pregnancy Early in the First Trimester ''. New England Journal of Medicine. 369 ( 15 ) : 1443 -- 1451. doi : 10.1056 / NEJMra1302417. PMID 24106937. External links Blighted Ovum on WebMD Anembryonic pregnancy on Radiopaedia.org Johnson, MR ; Riddle, AF ; Sharma, V ; Collins, WP ; Nicolaides, KH ; Grudzinskas, JG ( January 1993 ). `` Placental and ovarian hormones in anembryonic pregnancy ''. Human reproduction ( Oxford, England ). 8 ( 1 ) : 112 -- 5. PMID 8458911. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Blighted_ovum&oldid=805649389 '' Categories : Human pregnancy Health issues in pregnancy Hidden categories : Infobox medical condition Talk About Wikipedia Deutsch Español Français Bahasa Indonesia Italiano Nederlands Polski Edit links This page was last edited on 16 October 2017, at 19 : 20. About Wikipedia

Question: gestational sac but no yolk sac and embryo
Answer: blighted ovum or anembryonic gestation