Baruch Levin asks:
What would be the find,if the kalla became nida immediately after the chupat?
Baruch Levin,
Yerushalayim
The Kollel replies:
If she became a Nidah after immediately after the Chupah, "He sleeps among the men, and she, among the women," as the Gemara states on Daf 4a. (This is basically the Halachah, with various details as to its application.)
B'Virchas Kol Tuv,
Eliezer Chrysler