Hi, my babies weights were pretty much the same,1st born son =3.4kg, 2nd born son =3.5kg, 3rd born daughter =3.1kg , 4th born son =3.6kg and our fifth baby son born in dec`07,was my first c-section and only weighed 3.7kg, I was told that ultrasounds arn`t that accurate later in pregnancy, and because iam over weight the doctors told me my baby was going to be at least 10 pounds and because my fourth son`s shoulders got displaced,they recommended a c-section,this was the pits,so painful and long recovery,give me natural child birth any day. Anyway if a ultrasound can`t give us precise measurements what would a doctor know! Also that stupid measurement Fundal height mine was always out 3-4 weeks and none of my babies were ever 10 pounds. Cheers!