4 Weeks Pregnant: Gestational Sac Without Embryo - What to Expect

At 4 weeks of pregnancy, it is common for an ultrasound to show the gestational sac but not a visible embryo. The embryo is usually too small to be detected at this stage. The gestational sac is the fluid-filled structure in the uterus that surrounds the developing embryo. As the pregnancy progresses, the embryo will continue to grow and develop within the gestational sac. By 6-7 weeks of pregnancy, the embryo should be visible on an ultrasound. If you are concerned about the progress of your pregnancy, it is recommended to consult with your doctor.