Cool. Good to know.I just spoke to IRCC and you are right, they basically said that we don't have to do anything and they don't care until the child is born, Even if the child is born in Pakistan he/she would be a Canadian Citizen so all you have to do is some additional paperwork to get them sorted with their travel documents and then come to Canada.
And btw don’t worry about it. Its a good thing. Had a similar scare few days ago as these things could happen even when carefully planned. Look at it this way, may be this way you guys will start your family earlier and looking back you’ll be happy that it happened