SWB - I had a complete hysterectomy last April 25. Vaginal. No incisions but yes, slices and dices. My doctor is a marathoner and understood my desire to get back on the bike. He told me to wait a week, then get on the trainer & see how I felt. I did - and felt great. I asked him (just after surgery) if my planned flat century on May 5 (10 days out of surgery) was too much to consider. He said yes, to take it easy. So....(fellow TE'er KayTee will vouch for me here!)....I only rode 75 miles that day (because it was COLD and RAINY).
My point here is, listen to your body and don't overdo it. I did find that I could ride all day long on the flat - we don't have much of that around here - but mountains and climbing were VERY tough all year due to blood loss and almost non-existent iron reserves. My hematocrit was not up to normal levels until late September.
Good luck!
"When I'm on my bike I forget about things like age. I just have fun." Kathy Sessler
2006 Independent Fabrication Custom Ti Crown Jewel (Road, though she has been known to go just about anywhere)/Specialized Jett