The gestational bud appears at 7 weeks of pregnancy and is about 9mm in length and the diameter of the gestational sac is about 3.5cm. The fetal bud grows rapidly during early pregnancy, about 1mm per day, and can be seen around 6 weeks of pregnancy. If the fetus develops normally in the 7th week of pregnancy, the fetal heart will appear in 7-8 weeks, which can be seen by early ultrasound. It is forbidden to have intercourse in the first 3 months of pregnancy to avoid causing pre-eclampsia. Therefore, in the 7th week of pregnancy, you need to go to the hospital for ultrasound to check whether the size of the embryo and the gestational sac match the days of menopause, if the development is normal, there will be no bleeding and abdominal pain, if there is any abnormality, it should be treated according to the situation. Folic acid can be supplemented in early pregnancy to prevent fetal neural tube malformation and anemia during pregnancy. Also eat fresh vegetables and fruits in moderation and less oily, spicy and stimulating food. Go to the hospital for maternity checkups on time during pregnancy to keep abreast of the fetal growth and development.