I'm 21.5st and desperate for another baby. I had hoped we would have had another one before now. Ds1 is almost 6. Everyone around us is having babies and although I'm happy for them it's breaking my heart a little bit that it's not us. I've tried losing weight but i struggle and it always goes back on. I'm otherwise healthy - good blood pressure, no diabetes, and have started being careful with what I eat, don't drink, smoke or take drugs, and I have started swimming a couple days a week, but would it be terribly selfish or irresponsible for me to get pregnant this overweight? I was already overweight when I had my ds and had a fairly uneventful pregnancy under consultant led care - although I ended up being induced (unsuccessfully) because he was measuring large for dates - he was 10lb.