At 17 weeks the baby looks like a pear in the womb, is about 13 centimeters long and weighs about 170 grams. In the next 3 weeks, the weight and length will more than triple and the pregnant woman will begin to feel fetal movement. The 17th week of pregnancy is a middle pregnancy, the fetus is about 13 centimeters long and weighs about 170 grams, the fetal circulatory system and urethra have entered into normal working conditions, and the fetal lungs have been able to continuously inhale and exhale amniotic fluid. Generally, the weight and length of the fetus will increase more than twice during the 18th to 20th week of pregnancy, and fetal movement will begin to be frequent, so pregnant women can mostly feel fetal movement during this period. It is recommended that pregnant women in the mid-pregnancy should do a good job of timely screening, such as the discovery of fetal malformations to terminate the pregnancy in a timely manner, at the same time to pay attention to the mid-pregnancy of the rapid development of the fetus, must pay attention to balanced nutrition, and continue to meet the needs of the growth and development of the fetus, if any discomfort during pregnancy, should be followed up in a timely manner.