Pfft... That is like when DH and I were engaged, and we tried to add me to his medical benefits. They wanted a date, time, and reason for every single doctor's appointment over the last FIVE YEARS. Umm, I had been in a car accident, had two infections, and been dealing with fertility issues - do you really think I know all this crap, especially since that was after my doctor DIED and my records went missing? We just waited until we got married, then there was only one form and it was no big deal.
Totally ridiculous... Hopefully B can get it sorted out, I wouldn't fill it out either! You'd end up with higher insurance rates or something for being obese, when you're a perfectly healthy body weight for a woman who is six months pregnant!