Doctor Virginia Lazar - Sacul Yolk Sau vezicula vitelina este prima structura ce apare in interiorul sacului gestational. Poate fi observata inca de la 5 saptamani de amenoree, prezenta ei confirmand diagnosticul
The human umbilical vesicle ('yolk sac') and pronephros—Are they vestigial?
Pilot study establishing a nomogram of yolk sac growth during the first trimester of pregnancy - Detti - 2020 - Journal of Obstetrics and Gynaecology Research - Wiley Online Library
Sonographic Evaluation of the Yolk Sac - Tan - 2012 - Journal of Ultrasound in Medicine - Wiley Online Library
Sacul Yolk, semn de sarcina la prima ecografie | Copilul.ro