45 days of pregnancy belongs to the period of early pregnancy, this period is also an important period of fetal growth and development, so there are a lot of precautions in this period: the first point, but also the first point emphasized, that is, prohibit sex, because at this time sex is easy to cause uterine contraction, which can lead to miscarriage, but also easy to increase the risk of infection, affecting fetal growth and development, and may even lead to fetal deformity. The second point, in terms of diet, it is recommended that patients do not eat cold, spicy and stimulating food, and pregnant women are not recommended to stay up all night and drink alcohol, pregnant women’s diet to light, nutritious, high-protein, multi-vitamin this kind of food is the main. The third point, pregnant women should maintain a good mood, do not depression, anxiety, tension, or even irritability, which is also easy to cause miscarriage. The fourth point, once the pregnant woman has the symptoms of vaginal bleeding, abdominal pain, lumbago, which may lead to preeclampsia, or even inevitable miscarriage, it is recommended that the patient go to the hospital in time to consult the doctor, and then symptomatic treatment. Of course, there are some other aspects of precautions, such as not recommending patients to use skin care products, not recommending patients to abuse drugs, some of these situations are not conducive to the growth and development of the fetus.