We're expecting right now an she is 20 weeks in so the doctor has to clear her to shoot.
coyotewsm, I know some people are going to poo-poo this advice but just consider what I've got to say. Right now, your wife's body is essentially building a new human being. That developing life is very fragile and what your wife is exposed to now can matter for your child's whole life. The doctor will probably talk to you about concussive noise but that's not the whole picture.
We've got to be honest with ourselves that shooting is a dirty hobby. Most primers contain lead styphnate and inhaling it while shooting is the primary avenue for a lot of our lead exposure. While this is obviously worse when shooting indoors, outdoors on a still day, or when shooting a lot of rounds or with a group of shooters; it always is an issue. Handling spent cases is another place where we pick it up. Also, cleaning guns can be a source of exposure and not just to lead. A lot of cleaning and other maintenance chemicals are straight-up toxic. Remember that our adult bodies can take a lot more abuse than the little ones and we aren't trying to develop critical structures!
Yeah, we all know people whose mothers smoked while pregnant, or who played with mercury from a broken thermometer as kids and will say "but I'm fine". They might be. Health and development are probabilistic. Even if you dodge the bullet on the big stuff, what if your choices today could mean your kid is 5 points smarter, can run 5 seconds faster, doesn't end up with minor health complaints, or is just generally healthier? Isn't that worth it?
I'm just one guy on a forum, but I recommend that she takes a break. Keep up with
your shooting. Remember to keep your shooting clothes separate, wash your hands, and clean your guns in the other room. Be the protector. Once you've got that smiling baby in your arms and your wife is wrapping up the breast-feeding, she can come back to this. Then, she'll have something to protect. I don't know if this is your first but let me tell you, nothing motivates my wife like the safety of our kids.