Sporadic contractions of the uterus felt during the second and third trimesters of pregnancy in preparation for giving birth is called Braxton Hicks contractions. Unlike labour pains, Braxton Hicks contractions last for 30 seconds and can be uncomfortable, but usually, are not painful.
Braxton-Hicks Contractions in Pregnancy
Braxton-Hicks contractions or false contractions of the uterus are felt during the second or third trimester. It should be differentiated from true labor.