Which stage of labour is defined as the beginning phase where contractions start?

The beginning phase where contractions start is known as the first stage of labour. This stage is crucial as it marks the onset of the birthing process. During this phase, the uterus begins to contract to help thin and open the cervix in preparation for delivery. The first stage of labour is typically divided into two parts: early labour and active labour. Early labour involves gradual contractions that help prepare the cervix, while active labour features more intense and regular contractions that lead to significant dilation of the cervix.

In contrast, the second stage of labour involves the actual delivery of the baby, where the cervix is fully dilated, and the mother pushes to help the baby move down the birth canal. The third stage of labour occurs after the baby is born, focusing on the delivery of the placenta. The term "Delivery Phase" is not officially recognized within the standard stages of labour, making it less precise in describing the process. Thus, the first stage is correctly identified as the phase where contractions commence.