10 Most Frequently Asked Questions about Labor How do I know if I am in active labor? When should I call my doctor? When you are in true labor, you can start keeping track of your contractions. Note down the duration of each contraction and the intervals between contractions. Mild contractions may last about 60 to 90 seconds and occur at 15 to 20 minute intervals. Active labor is when you have strong contractions lasting … Continue reading 10 Most Frequently Asked Questions about Labor