At 4 months, the fetus has basically taken shape, the face has a clear outline and appearance, each feature is more obvious, the head is gradually straightened, the bones and muscles are developed.
In the 4th month of pregnancy, the development of each organ of the fetus is basically completed. Through ultrasound, you can see that the five senses of the fetus are gradually becoming obvious, the neck is fully formed and able to support the movement of the head, the limbs can carry out activities, the toes and soles of the feet can be flexed, and the placenta and the umbilical cord are gradually appearing. The eyes are in a closed state, but are able to sense changes in light.
Indicators for evaluating the physical size of the fetus mainly include abdominal circumference, biparietal diameter, femur length, head circumference, etc. The biparietal diameter of a 4-month-old fetus is about 3.2 centimeters, the femur length is about 2.0 centimeters, the head circumference is about 12 centimeters, and the abdominal circumference is about 10 centimeters.
Pregnant women are advised to maintain a balanced diet and nutrition, exercise appropriately, stay in a happy mood, and have regular medical checkups to ensure normal growth and development of the fetus.