SLIDE 10
(Thomas Hildebrandt)

Here is a very early pregnancy. With forceps you can use the dimension of this pregnancy. This wide stripe is the embryo. And in ultrasound it looks so, it's such a small black cavity with a small white mass inside.

Here it's an old pregnancy, about 7 months. You see, it's a differentiation between the vertebrae, ribs, heart, lung, stomach, bladder, and the placenta.