I had an ultrasound today, having our 6th boy!!!!!!! They said he was the length and weight of 18 weeks, but his femur measured 14 weeks so I was probably 14 weeks. I have been feeling definite movement for 3 weeks, and my uterus is measuring 18 weeks. I am CONFUSED!!! I see my midwife Monday and will go from there as to what she thinks. Anyone have any experience or answers why my baby is huge for 14 weeks, or normal for 18 weeks but extremely small femurs? The baby was 4 inches from crown to rump and 3 ounces. Everything i come up with says 1 and a half ounces for 14 weeks, and 3 inches or so for height. Wonder how my midwife will decide this one?