Pregnancy ultrasound with fibroids will not affect the fetus in most cases, but there is a possibility that the large size of fibroids and the pressure of fibroids on the uterine cavity may affect the development of the fetus. Therefore, whether uterine fibroids will affect the fetus is related to the size and location of the fibroids. 1. The size of fibroid: if the size of fibroid is less than 5cm, and the patient has no obvious symptoms, it usually will not affect the fetus. If the size of uterine fibroids is more than 5cm, multiple or single uterine fibroids grow faster, it may affect the nutrition supply of the fetus, which may in turn affect the fetus. 2. The growth site of uterine fibroids: (1) Sub-plasma fibroid: if the fibroid is sub-plasma fibroid, i.e. the fibroid will grow towards the abdominal cavity, it will not affect the development of the fetus. (2) Submucosal fibroids: in the case of submucosal fibroids, the fibroids will grow into the uterine cavity, and when the size of the fibroids is relatively large, the embryo may not be able to land or miscarry, which may affect the growth and development of the fetus. (3) Intermural fibroids: After suffering from intermural fibroids, if the fibroid grows to the subplasma membrane, it usually will not affect the development of the fetus. However, for fibroids that grow toward the submucosa, they may affect the fetus. Therefore, whether fibroids detected after pregnancy will affect the fetus or not needs to be comprehensively judged according to the specific conditions of the fibroids after the doctor’s interview.