Author = AHMED M. AWARA, M.D., RASHA A. EL-SHEIKH ALI, M.Sc.;
Sonographic Evaluation of the Yolk Sac and its Relationship to the Pregnancy Outcome

Volume 87, September, September 2019, Pages 3261-3266

RASHA A. EL-SHEIKH ALI, M.Sc.; AHMED M. AWARA, M.D.; EMAD M. MASHALY, M.D.; NAREMAN M. EL HAMAMY, M.D.