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Yolk sac and its effects on fetal prognosis
2018
International Journal of Reproduction Contraception Obstetrics and Gynecology
The yolk sac is the first extra embryonic structure that becomes sonographically visible within the gestational sac. It provides nutritional, metabolic, endocrine, immunologic, and hematopoietic functions during organogenesis in embryonic life, before placental circulation is established. Spontaneous abortion rates are significantly elevated where the yolk sac volume falls outside the 5th to 95th percentile. Abnormal morphological appearance of the yolk sac is also suggestive of serious growth
doi:10.18203/2320-1770.ijrcog20184936
fatcat:bq5zuzlg5vbznfa3dhoeup3hcq