I would like to book 2 award tickets through BA for a QR flight for next spring. I would like to book now as there is enough award space at the moment.

My wife is pregnant and we expect our newborn in November. Would it be possible to book the award tickets now and call BA to add our new born to our tickets beginning of December? Does anyone have experience with this? Is this possible or is this going to be a problem as we book through BA for a QR flight?