Which of the following describes the activity level of Braxton Hicks contractions?

Braxton Hicks contractions are characterized as irregular and often painless. They usually start occurring in the second trimester and can increase in frequency as the pregnancy progresses. Unlike true labor contractions, which become progressively more regular and intense, Braxton Hicks contractions serve as a practice mechanism for the uterus, preparing for the actual labor process. Their irregular nature means they do not adhere to a consistent pattern, which is a distinguishing feature from the contractions associated with true labor. Additionally, these contractions usually do not cause any significant discomfort, which further emphasizes their often painless characteristic. This variability and lack of intensity are what set them apart as a normal part of pregnancy rather than indicative of impending labor.