A fetal bud of 1.1cm can be roughly extrapolated to between 7-8 weeks of pregnancy. In addition to calculating the number of weeks of pregnancy based on the last menstrual period, for those who have irregular periods, the length of the fetal buds in early pregnancy can also be roughly estimated according to the formula fetal buds (cm) + 6.5 for the number of weeks of pregnancy, so when the fetal buds are 1.1cm, it can be roughly calculated to be between 7 and 8 weeks of pregnancy. At this time, the embryo has taken shape, the shape of the fetus has been determined, but the placenta has not yet been formed, it is the time of preeclampsia, we need to carry out regular obstetric examination to check whether the size of the fetus is in line with the actual weeks of pregnancy, through the fetal heart and fetal buds, combined with the blood hCG and progesterone indicators to determine whether the development of the embryo is normal. It is recommended to pay attention to rest in early pregnancy, avoid strenuous exercise and heavy physical labor, away from toxic and harmful substances, take medication with caution, avoid spicy and stimulating food, increase nutrition, eat more fresh vegetables and fruits to replenish vitamins, eat more fish and shrimp, lean meat and eggs and milk to replenish high-quality protein, and follow the doctor’s advice to take oral folic acid to prevent fetal neural tube malformation.