The normal range of placenta thickness in 23 weeks of pregnancy is between 2-4cm, generally the thickness of the placenta should be thicker first and then thinner, and the placenta will gradually mature as the pregnancy progresses. The nutrients needed for fetal development are obtained through the placenta, so the functioning of the placenta directly affects the health of the fetus. Pregnant women should be alert to problems such as placental insufficiency in their daily life, so as to avoid causing fetal malnutrition or fetal hypoxia. During pregnancy, the placenta of some pregnant women may have abnormalities, manifested as placenta too thick or placenta too thin. Usually the thin placenta is prone to bleeding and needs to be examined in the hospital; while the thick placenta needs to be alerted to whether the growth of the fetus in the uterus is abnormal or not, because at this time, pregnant women are prone to placenta prolapse, early maturation of the placenta calcification, which may cause the fetus to be hypoxic in the uterus. Pregnant women should pay attention to regular checkups to monitor the condition of the fetus in the womb and terminate the pregnancy in time when the fetus is in danger. Meanwhile, regular ultrasound is recommended to monitor the condition of the placenta, and once abnormalities are detected, timely measures can be taken to ensure the health of the fetus and the mother. In daily life, pregnant women in the middle and late stages of pregnancy should pay attention to supplemental nutrition, eat foods with high protein content, such as eggs, fish, shrimp, milk, etc.; eat more fruits and vegetables, pay attention not to eat cold and spicy food, nutrition should be balanced; regular pregnancy checkups to observe the development of the fetus.