There is a diagram on page 13 in your maternity record (Mutterpass). It gives an overview of how your baby's growth is developing. Your doctor can enter the results of ultrasound examinations here. The distance from the crown of the head to the rump is measured in early pregnancy. Later, the diameter of the head and the diameter of the belly will be measured. The diagram for the growth curves is divided into three zones, and a separate curve is drawn for each. The thick centre line in each of these areas shows where so-called ideal value is. Above and below this line are two other lines, which are somewhat thinner. All entries between these marks indicate normal development. However, the values of these norm curves apply to women of European ethnicity. Development is always assessed individually by the people responsible for your medical care.

ATD Abdominal Transverse Diameter. This is the transverse diameter of your baby bump from left to right

SSL crown-rump length (Scheitel-Steiß-Länge). The length of the embryo or fetus from the crown of its head to its rump

BPD Biparietal head diameter. Distance from temple to temple.