When pregnant women are deficient in vitamin D, they may suffer from twitching of the limbs, including weakness of the limbs, dry skin, nervousness and easy sweating, and vitamin D deficiency may also cause diseases during pregnancy, such as diabetes, hypertension or osteoporosis, and rickets. Therefore, in the absence of vitamin D, it is necessary to take calcium supplements as much as possible to avoid the occurrence of such diseases, and also to eat more fruits and vegetables to achieve balanced nutrition, and to eat more meat, milk or protein, which are easily absorbed and contribute to the health of the fetus and the pregnant woman. During pregnancy, you must pay attention to the various examinations to ensure the stability of the fetus, and also pay attention to the hygiene of the vulva to avoid cross-infection due to lack of attention to the hygiene of the vulva, which will also cause the chances of affecting the fetus.