If the gestational sac is 13mm from the incision, you can consider having it, and the pregnancy should be closely monitored and the position of the gestational sac and the scar should be observed dynamically when the pregnancy continues. The fact that the gestational sac is 13mm away from the incision means that the gestational sac is relatively close to the lower uterine scar. As the fetus develops, the gestational sac may grow upward or downward. If the gestational sac grows upward and away from the scar, it is usually not a big problem. If the gestational sac grows downward and reaches the scar, and covers the incision, forming a scarred pregnancy or placenta implantation, the pregnancy should be analyzed according to the actual situation, and it is generally not recommended to continue the pregnancy. Pregnant women should pay attention to regular pregnancy checkups and closely monitor the relationship between the gestational sac and the scar when the gestational sac is found to be 13mm away from the incision.