____ contractions are nonrhythmic, sporadic, generally not painful, and increase in frequency, intensity, duration, and regularity starting at the midpoint in the second trimester.

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Nonrhythmic, sporadic, generally not painful contractions that increase in frequency, intensity, duration, and regularity starting at the midpoint in the second trimester are known as Braxton-Hicks contractions. Isometric and eccentric contractions refer to muscle contractions during exercise and are not related to pregnancy. Quickening refers to the first fetal movements felt by the mother, which typically occur around 16-22 weeks of pregnancy.

____ Contractions Are Nonrhythmic, Sporadic, Generally Not Painful, and Increase