A 1.2 cm submucosal fibroid is relatively small and usually does not affect pregnancy. Submucous fibroid is a type of uterine fibroid, which refers to fibroids protruding from the uterine wall towards the uterus and coming into direct contact with the mucous membrane layer, accounting for about 10% of cases. The etiology is not yet clear and may be related to genetic and hormonal factors. Submucous fibroids measuring 1.2 centimeters generally do not affect fertility, when the size of the fibroid is relatively small and most women can have a successful pregnancy. If the size of submucosal leiomyoma is found to increase gradually in the later stage, it may affect pregnancy after exceeding 4 centimeters, and timely surgical treatment, such as myomectomy, is needed before normal fertility is possible. 1.2 cm submucosal leiomyoma usually does not affect pregnancy, and most patients do not need treatment if they do not have clinical symptoms. If the fibroid is found to be enlarged or symptoms appear, it is necessary to take relevant treatment measures to avoid affecting fertility. During the period of preparation for pregnancy, women should pay attention to rest more, and at the same time should relax, avoid tension and anxiety, and should go to the hospital in time if there is any discomfort, so that the doctor can make a clear diagnosis and cooperate with the doctor to deal with the symptoms.