How big is the baby at four months pregnant?

Patient's question:

No

Doctor's answer:

Months, that is, the fetal length at 16 weeks of gestation is about 16 cm, crown-rump length is 12 cm, and weight is about 110 grams. External genitalia can distinguish gender, hair has begun to grow, breathing movements have appeared, and some mothers have already consciously felt fetal movement.