When I had my daughter, obstetric ultrasound was relatively new. My British obstetrician proudly told the story about the Glasgow obstetrician who saw the potential in ultrasonic testing for cracks in submarine hulls. I had one scan late in my pregnancy because the obstetrician suspected that my baby was quite small. The images were unsettling – at 28 weeks, her body was too big to completely fit on the screen, so it appeared as if her legs, arms, and torso were unconnected. I left the room, shaken. After waiting for the results for a day, I heard that the verdict was in – she was growing normally. (Her birth weight was a decent 8lb 8oz.) Even with the good news, it was hard to reconcile those images with the feeling of her inside me.