The size of the baby at 7 weeks of pregnancy is around 10mm, when the facial organs are almost formed and the bones are in a soft state. Generally speaking, at 7 weeks of pregnancy, an ultrasound examination can see a gestational sac in the uterine cavity, and there is an obvious fetal heartbeat in the gestational sac. Fetal organs and viscera have gradually developed, fetal bone tissue is still in the state of soft body; facial organs are basically formed, and the heart has begun to separate the left atrium, right ventricle, and began to beat. In addition, at 7 weeks of pregnancy, pregnant women need to take folic acid supplements to prevent the occurrence of fetal neural tube malformation. If pregnant women experience abdominal pain and vaginal bleeding, it is recommended that they consult a doctor in time, and under the guidance of the doctor, complete the relevant examinations to clarify the cause of the disease and timely treatment.