Depending on the time of pregnancy and the nature of the pain, pregnant women can accurately predict the type of uterine contractions, thereby helping to promptly protect the fetus in emergency situations such as premature labor, miscarriage, etc.

Along with the phenomenon of fetal movement, sometimes the pregnant mother will feel a hard lump in her abdomen, which can even "distort" the abdomen. Especially, in the last months of pregnancy, these contractions will appear more and more with different intensities and frequencies.