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
Origin and function of the yolk sac in primate embryogenesis | Nature Communications
What is “ Yolk Sac ”? | Prime Fertility Clinic
USG in Obstetrics: Yolk sac - YouTube
Yolk sac - Wikipedia
Distanţa dintre vezicula vitelină şi embrion asociată cu inhibina A în sarcina de trimestrul I – care este noutatea?
sarcina- saptamana 6 | unpiticatatdemic
The human umbilical vesicle ('yolk sac') and pronephros—Are they vestigial?
Yolk sac - Wikipedia
Origin and function of the yolk sac in primate embryogenesis | Nature Communications
Yolk sac size & shape as predictors of first trimester pregnancy outcome: A prospective observational study - ScienceDirect