Seven weeks gestational sac without fetal heartbeat and buds, consider whether there was a fetal arrest or a miscalculation of the duration of the pregnancy. If the pregnancy is seven weeks old, there are usually fetal heartbeats and buds. If there is no fetal heartbeat, it is recommended to observe the pregnancy for another week. If there is still no fetal heartbeat, it is necessary to consider termination of the pregnancy, and the next pregnancy will require active preconception testing. If you remember the wrong time of pregnancy, then you need to be corrected, usually not a big problem, the main thing is to carry out regular pregnancy tests.