1 Send your and your wife FBI clearence
2. When she visits the your Doctor, she will know about the Due date of they baby
3. If she has to do the Medical for Canada through DMP, let him/her know about her Pregnency, the DMP will advise your wife what to do, they will not take x-ray. X-ray is for TB and they can know through other methods, When husband has no TB it means Wife has no TB, DMP will tell you what to do .
4 Once your wife is pregnent for 2-3 months she should visit your Doctor the doctor will give the delivery date and if your case is supposed to be approved before the delivery of Baby, better to inform the Canadian Counsulate where your file is by writing your file# and inform about Baby
5.
If the Baby is born before you get your Approval, you can add baby to your file by paying application fees for baby and providing the info about baby.
6 If your file is approved before Baby Birth, you still can add Baby to your Landing papers, you should return your Landing paper and inform them about the baby, they will isuuue you know Landing papers for you, your wife + Baby.
7 If your baby is born in US your baby will be allowed to accompany with you to Canada with US passport and you have to Sponser the baby as PR from Canada.
Good Luck!!