It may be normal to see a gestational sac on the left side of the uterine cavity, or it may be abnormal for the gestational sac to grow toward the left uterine horn and fallopian tube, i.e., uterine horn pregnancy. 1. Normal phenomenon: the uterine cavity to the left of the gestational sac is found through ultrasound examination of the gestational sac in the left side of the uterine cavity of the left part of the bed, the embryo will continue to develop in the process of growth to the direction of the uterine cavity, can be developed into a normal fetus, such a situation does not need to be dealt with in a special way. 2. Abnormal phenomenon: the uterine cavity to the left of the pregnancy sac, with the increase of gestational weeks, the embryo to the left side of the uterine horn and fallopian tube direction of growth, considered to be the uterine horn of the pregnancy, due to the uterine horn of the muscle tissue is thin and rich in blood, fertilized egg in the uterine horn of the bed is easy to cause rupture of the muscle layer and hemorrhage, the case is not normal. Early pregnancy found in the uterine cavity to the left of the pregnancy sac, need to go to the hospital after 1 to 2 weeks to review the ultrasound to observe the growth of the pregnancy sac, to understand the location of the pregnancy sac, most of the uterine corner of the uterus need to terminate the pregnancy in a timely manner.