After bih Ductus Venosus anatomically closes by
High-Yield Explanation
The ductus venosus constricts by 10 to 96 hours after bih and is anatomically closed by 2 to 3 weeks, resulting in the formation of the ligamentum venosum.Reference: William&;s Obstetrics; 24th edition; Chapter 7; Embryogenesis and Fetal Morphological Development