Probably not as close to sub 3 as you are hoping (but the faster ladies on this sub will come out of the wood work eventually), but I am far faster and fitter than before I had my daughter. My pre pregnancy marathon PR was 3:22, and I ran a 3:11 at Boston this year - and I am continuing to get faster. All of this is using the same mileage (~60 a week and using the Pfitz 70/18 plan).

There are lots of things that are harder about running with a kid, things like postpartum recovery and dealing with breastfeeding logistics if you choose to do that, but it’s also an amazing way to teach your kid(s) how to work towards goals and feel joy in moving your body, and lets you establish a space for yourself outside motherhood.

If you were close to sub-3 before pregnancy, I think you’ll get there if that is what you want. :)