Break it down into 3 categories:
1) Frequency: refers to the length of time from the beginning of one contraction to the beginning of the next
2) Length: measure the length of contraction from beginning to end
3) Strength: this can be assessed by placing your fingertips at the top of uterus and feeling how tight the muscle is at peak contraction
Prepare for imminent delivery with strong contractions, 60-90 seconds in length, and frequency 2-3 minutes apart (Primips) or 5 minutes or less (Multips).