What type of uterine contractions can lead to less than 1 cm dilation per hour and a halt in progress for more than 2 hours?

Hypotonic contractions are characterized by a decreased frequency, intensity, or duration, which leads to ineffective labor progress. When these types of contractions occur, they often result in less than 1 cm dilation per hour, indicating slow progress. Furthermore, when hypotonic contractions are present, labor may stall for more than 2 hours, thereby contributing to a situation where the cervix does not dilate as expected.

This is in contrast to hypertonic contractions, which are excessively strong and frequent but can also lead to lack of effective progress. Normal contractions would typically facilitate continuous dilation and progress during labor. Irregular contractions may occur during the early stages of labor, but they do not usually result in a consistent slowing of progress if they transition to regular contractions. Hypotonic contractions are specifically associated with labor that is not progressing as desired.