One kid. Rode up to about 7 months pregnant and then was back on my bike 11 days post-baby. Some road riding but I'm more of a mountain biker.

1. No.
2. No change in gait that I'm aware of. My feet were really sore off and on for a few months post-baby which was odd because I had no foot problems at all during pregnancy. It went away eventually.
3. No saddle problems.
4. YES!!! I had never had hamstring problems in my life but around 7 months post-baby I started having hamstring problems and was later diagnosed with a torn hamstring. My PT said that I have "significant weakness" in my hips and that my glutes aren't firing. I also suspect a lack of core strength post-baby might have played a part. This does NOT bother me on the bike at all but it bothers me a lot with running and it's been incredibly frustrating to try to heal.

Not to threadjack but I'd love to hear the experiences of anyone else that has had hamstring problems post-baby. I should note that I don't know for sure that my hamstring problems were caused by having a baby but I find it odd that I NEVER had a problem before this ... I also ramped up my running mileage pretty quickly this summer so that might have had something to do with it too.