There is some risk of a left-sided gestational sac. If the gestational sac lays in the left horn of the uterus, there is no danger if the embryo grows in the direction of the uterine cavity as it continues to develop and can develop into a normal fetus. However, if the embryo grows in the direction of the left uterine horn and the fallopian tube during development, because the muscular layer at the uterine horn is weak and rich in blood flow, as the fetus grows, if the placenta erodes the uterine horn it may lead to rupture of the uterine horn, causing hemorrhage as well as hemorrhagic shock in the pregnant woman. Therefore, if a left-sided gestational sac is found in early pregnancy, it is necessary to review the ultrasound in 1-2 weeks to observe the growth of the gestational sac and understand the position of the gestational sac, if it is still in the horn of the uterus, it means that it is an ectopic pregnancy, in which case hysteroscopic treatment can be adopted, which is a safe and effective treatment to correct the left-sided gestational sac in time. If the gestational sac continues to develop towards the horn of the uterus and the fallopian tube, the pregnancy should be terminated in a timely manner according to the doctor’s advice to avoid adverse pregnancy outcomes. For balanced nutrition of the pregnant woman’s body and to promote the development of the gestational sac in her body, it is important for pregnant women to take proper folic acid supplements in the first trimester of pregnancy, which is helpful to promote the development of the gestational sac and prevent fetal neural tube malformation.