After a C-section, they'll want to have you up and walking within 24 hours. Because of the damage to your abdominal muscles, I would expect biking to be out at least until the stitches come out. I don't know when mom got back on her bike after me, but I was a November baby, and this was 30 years ago. I don't think mom was an icebiker way back then *g*.

Mom didn't have much choice about me being born via C-section... she and I were both dying after 72 hours of nonproductive labor. Since there was no medical reason preventing me from being born normally, for my sister and brother they didn't even try labor. If mom had had a choice, I would have been born vaginally. Her recovery from each C-section was much harder than her friends' recoveries from vaginal birth. She's really active about discouraging young mothers from C-sections, and says the recovery period is the most difficult she's had for any surgery (including a hip replacement and a botched shoulder replacement).

If you must do a C-section, be real up front with your doctor about your activity level and goals. Even if you can't bike, there should be core strength exercises that are safe to do. A good physical fitness baseline makes any surgery easier, and a C-section is just brutal on your body. If you can dodge the bed rest bullet, do. Bed rest makes recovering from a C-section even harder.