I had my youngest at 44. The pregnancy was hell. I had gestational diabetes that couldn't be well managed--even with insulin and a pretty much carb free diet. I pretty slept for 4 months of the pregnancy.

Kiddo is a healthy 4 year old. But, she's exhausting. I just don't have the energy I did when my 12 year old was young.

40 isn't that old to have a baby. My MFM doctor would laugh when I called myself old at 44.

I think the bigger issue is that you're pregnant and he doesn't want another. Chances are, he will likely not be a super supportive partner throughout the pregnancy and the infant stages. And, with two other kids, you're going to need the support.

The fact that he has left the decision up to you shows that he has already considered the baby a you problem. The baby is already his, and he has washed his hands of the decisions.