labour that happens on it's own
labour that begins on its own without any medical augmentation. During the first phase of labour, the cervix dilates and thins out and contractions begin, usually lasting 30 to 45 seconds each with five to 20 minutes between them.
labour has 3 stages
labour is divided into three stages. The first stage begins at the onset of contractions and ends when the cervix is completely dilated. The second stage is the delivery of the baby. The third stage is delivery of the placenta.