Q. When the husband of a pregnant woman gets pesicha, (See question 1549 above), does he also close the doors, or that is given to someone else?

A. Oitzar Habris (1: H. Meuberes 14: n. 23) quotes Sefer Hachaim 1: 8), that although there are those who have the minhag that the husband only opens the ark and does not close it, it is incorrect and once the husband has began doing the mitzva, he should bring it to its conclusion. He adds that this is also the segula or propitious act for having the end of the birth process come to a healthy termination.
Horav Shlomo Miller’s Shlit’a opinion is similar for those that follow this particular minhag

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a