At 19 weeks the baby looks humanoid in the womb and the organs are not yet mature. At 19 weeks of pregnancy, the baby’s internal organs as well as its limbs are basically developed, but have not yet reached full maturity. Curled up in the mother’s uterine cavity, the fetus’s limbs may engage in a small amount of activity, but the intensity of the activity is relatively small, the amplitude will not be very large, and the pregnant woman may have the feeling of fetal movement, if any. During this period, the length of the baby is about 15cm and the weight may be between 200~250g. The baby may already be able to swallow amniotic fluid, the kidneys may be able to excrete urine, and the nervous system is at the stage of differentiation and gradual development. It is important to pay attention to regular labor and delivery checkups during pregnancy.