How big is the baby at 12 weeks of pregnancy?

Patient's question:

No

Doctor's answer:

At the 12th week, the fetal body grows rapidly. The fetus is about 7~9 centimeters long and weighs 21~22 grams. It has completely formed into a small humanoid figure, but the head is large and round, accounting for half of the body's total length. At 12 weeks, the gender is distinct, the head and neck are clearly separated, and there are sucking-like movements after stimulation. The eyelids can also react, and breathing can occur.