My situation was a little different because DS was a natural bub, and the little apple blossom I'm pregnant with now is an IVF PGD bub. We were still faced with the "how long should we wait before we start" question though. We knew we wanted a small age gap, but I also wanted to breastfeed DS as long as I could. I looked into the breastfeeding issue a lot and spoke to someone at the ABA who pointed me to the podcast that Marcellus posted. I was even told that if I had questions the lady from the podcast would happily call me and talk to me. When I saw my IVF doctor I was totally amazed because he said he was happy for me to continue breastfeeding because my cycle had come back and was fairly regular (despite still breastfeeding 10-12 times a day/night!). I was on relatively low doses of two drugs and found that it didn't hugely affect my supply (DS still got his 10-12 feeds), but since I've fallen pregnant it's been a different story. My milk supply has dropped dramatically over time and DS now gets only 3 feeds a day (well one during the day, one at 11pm and one around 4-5am). He's coped well though but definitely still wants it when he can get it. My biggest problem is that the pregnancy hormones have made my nipples so sensitive that it's pure agony when he feeds, but I'm sure that doesn't happen to everyone.

One thing you might want to think about is how quickly you fell pregnant with IVF the first time, because it may take about the same amount of time again. Actually, I just noticed that you have some frostie bubs, so things might move very quickly if you are lucky!