As long as the rest of the labor is progressing with gradual increasing contractions and she is feeling fine, all is going according to plan. (babygaga.com)
Were you given «tea» or another beverage during labor that seemed to be exceptionally effective at increasing your contractions? (honestmidwife.com)
When the outside temperature goes down, the mammal's body reacts by increasing the contraction of muscles, which mammals do voluntarily or by shivering. (fitnessandpower.com)