The ductus aeriosus closes anatomically within:-
- Anatomical closure of ductus aeriosus occurs within 10 to 21 days after bih. Occurs by proliferation of its intima cells - Functional closure of ductus aeriosus occurs immediately after bih by smooth muscle contraction which occurs as a result of increase in oxygen saturation.
Immediately after bih
7 days after bih
4-6 weeks after bih
10 - 21 days after bih
Fetal circulation