I've had my 12 week scan today, they measured the baby at 11+4 (which matches my ovulation date). The lady said that the baby's abdominal wall (where the umbilical cord goes in) isn't fully closed yet so they have me come back in 2 weeks time. Has anyone had anything like this and can share their experience? I'm trying not to worry as they say it should be closed at 12 weeks but it's easier said than done.. thanks.