What level of Montevideo units reflects adequate contraction strength?

Adequate contraction strength during labor is typically assessed using Montevideo units, which measure the amplitude of uterine contractions and their frequency over a specified period, usually 10 minutes. A value in the range of 200-250 Montevideo units indicates strong uterine contractions that are likely effective in promoting cervical dilation and facilitating the labor process.

When uterine contractions are strong enough, they produce sufficient pressure to exert force on the cervix, leading to effective labor progress. Values below this range may not provide adequate contraction strength necessary to promote cervical changes, while values higher than this can sometimes suggest hyperstimulation, which may lead to complications such as fetal distress.

In summary, a range of 200-250 Montevideo units is recognized as effective for promoting labor progression, making this the correct answer.