Its not a custom I particularly like or agree with, but just wanted to share that this is how this function happens.
After you've been given all the gifts/blessings, in some communities, the girl takes a bath/changes her clothes, and then she has to put on a fresh pair of clothes, preferably new ones. That's when she can take the bridal wear off. Imagine wearing heavy clothes and jewellery when you're pregnant.
Also, as far as I know, this is true only of the first kid. People don't have godbharai for the second kid, or do they?