I realize this post is old, but in case this is helpful for others....not pregnant now but I have 2 little ones and we have considered a 3rd.
You can do cadaver lab, my school required a pregnant student to wear a special mask thing with a filter.
My piece of advice is plan to get through your first year before deciding to get pregnant if you can. You will learn so much about your program and schedule and be better able to evaluate. Plus the first semester was a family nightmare in my case (I have 2 kids....just going back to school, scheduling and the like). I can't imagine trying to do it pregnant. If you can wait until a few semesters in to get pregnant, you can adjust first. Also, some schools are stricter than others. If you happened to give birth early and couldn't finish a semester for example, you might have to roll back a whole year.
This biggest downside I see is that you can't get a maternity break. If you have your kid in school you don't get weeks off like at a job. You literally might have to find daycare and be back in a few days. We have a short summer break and have considered timing for that but that's very hard to do obviously. Our current plan is to consider my final year and maybe plan to have a baby immediately after graduation. It's not ideal age wise but it mighty have to do. (I'm 34 now and in my first year)