Just realised I'm pregnant with 4th child. 3 normal pregnancies and straightforward births. Had my others when I was 33, 35 and 37. My mum had her last at 41 - I'll be 41 in a couple of months. I am about 3 stone overweight too and was just starting an exercise/diet routine. Anyway - impact on the other 3 of a baby with any problems seems more pressing this time. I know nothing is 100% certain, but what would you have and where to narrow those things down?