Miscarriage

I did an intense science degree for my undergrad but I am still feeling overwhelmed after the first week of classes. Right now we are just learning about the general science we need to learn the rest of the body systems. We have learned a bit about genetic diseases and I was surprised how many pregnancies end in miscarriage, aka spontaneous abortion. About 1 in 6 pregnancies end in miscarriage and of those about half are due to genetic diseases. This was really surprising to me and I could not believe how hard it was to carry a child to term, especially once women age. There are so many extenuating factors that influence pregnancy like too much exercise that I didn't even realize. This is especially relevant because I am in that age group where most of my friends will soon be getting married and having children and miscarriages can happen to even the youngest and healthiest women. There is a lot of conflicting evidence available about the affect of caffeine of pregnancy (despite popular belief that any caffeine is bad) and there don't seem to be many reputable online resources that tell women what to do/not to do during pregnancy. I am very interested in learning more about this topic, so if anyone has any interesting articles on miscarriage or pregnancy tell me!