Level 1: Development of the fetus at 3 months of pregnancy. At 3 months of pregnancy, the fetus has begun to form various organs and organs. At this time, the fetus is about 9 centimeters in length and weighs about 30 grams. At this stage, the fetus\’s head is relatively large, taking up more than half of the body. In addition, the fetus\’ limbs also begin to gradually develop fingers and toes, and are able to make fists and stretch. Level 2: Nutritional needs of the fetus at 3 months of pregnancy. At 3 months of pregnancy, the fetus needs nutrition.