At seven weeks of pregnancy, the size of the gestational sac should be around 2.5-3cm, at which point the fetal heart and buds should be visible. If you don’t see a fetal heart or buds at seven weeks of pregnancy, the embryo has stopped developing. If the gestational sac is more than 2.5cm and you don’t see a fetal heart or buds either, it also means that the embryo has stopped developing. Therefore, it is important to determine whether the pregnancy is normal or not based on the time of pregnancy. If there is no fetal heart or buds, you need to have an abortion, which may cause infection or hemorrhage if it takes a long time. If there are fetal hearts and buds, regular pregnancy checkups should be done.