Well firstly, since this started as soon as your pregnancy was confirmed, it would seem that he's not un-attracted due to your weight gain, but probably has a mental block regarding sex with a pregnant woman.

This is a fairly common issue.


A simple honest discussion and maybe even a talk between your Dr and him should be able to help him along.


Secondly, he can be present at the birth without having to watch the baby exit. He can stay close to you and hold your hand...


The no sex in the birthing room, that confirms my suspicions about your hubby's behavior...


Seems that he is currently unable to think of his baby's mother as a sexual being, he might even worry that penetration is wrong, harmful or disrespectful to his unborn child.


Couples counseling is your marriage's best shot at this point, because if these beliefs of his get the opportunity to take root, you may never have sex again.