Quite a few things, actually.
“Thank the Gods it is not mine.” I was snipped in the 80’s when I decided that I did not want children.
As far as thinking a pregnant woman is attractive vs. unattractive, it depends on the woman like they are when they are not pregnant. Some women are absolutely strikingly beautiful when pregnant, some are not.
That being said, I do not think I could have sex with a pregnant woman when she is seriously showing. I know that I would not damage the baby or her but that is what my mind says. My emotions say “oh Gods what if I hurt her or the baby?” I know that most women can have sex safely well into their pregnancy but my emotions would say “No!” I am also the sort of guy that, despite my field of employ, is always afraid of “breaking” a baby if I touch one.
Another thing, having worked in the medical profession for decades, that goes through my mind is just doing a check over for some signs of eclampsia and pre-eclampsia and wishing the baby and mother luck. I have done a few shifts in the NICU (in a low capacity) and have seen things there that will live with me forever.
I also have passing thoughts that I hope she has not used drugs or alcohol during pregnancy and that, if she does not, she and her child does not have bad luck in the birth lotto. I know too much of the variety of horrific genetic disorders and birth defects ( Harlequin type ichthyosis for just one out of only the Gods knows how many) and the effects of drug and alcoholic use on the fetus. Refer to “having done a few shifts in the NICU”... the effects of these things are heartbreaking and devastating.
I hope that she has a good man to be the father and, if a lesbian, a good woman to be co-mother (whatever that is called). If not, I hope she has a good support system if she is to raise it alone.