In the first stage of labour, contractions increase in frequency, duration, and intensity until the baby's head is able to pass through the cervix.

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Quizplus · Accepted Answer

This is correct. During the first stage of labour, the cervix gradually opens (dilates) to around 10cm in diameter, allowing the baby's head to pass through. Contractions increase in frequency, duration, and intensity until this happens.

In the First Stage of Labour, Contractions Increase in Frequency