There is no specific figure to measure how much small fibroids will increase during pregnancy, and there are some individual differences. As small fibroids belong to hormone-dependent tumors, after pregnancy, the hormone level in the body secretes vigorously, small fibroids may increase rapidly, and some of the fibroids are prone to lead to red degeneration, etc. Some women’s small fibroids do not increase significantly during pregnancy, but some women may increase several centimeters in late pregnancy. Some women’s small fibroid enlargement after pregnancy is not obvious, and may increase about 1-2 centimeters in the whole pregnancy period, but there are some women’s small fibroid enlargement after pregnancy is rapid, and may increase several centimeters in the late pregnancy period. For small fibroids generally will not affect the fertilized egg implantation leading to miscarriage, but small fibroids will gradually increase in size with pregnancy. If fibroids are detected before pregnancy depending on the location, size, and accompanying symptoms of fibroids, you may consider treating them before getting pregnant, which is safer. If small fibroids increase in size during pregnancy, regular visits to the hospital are required.