UNIT 4 Physiology, management and care during labour 🌼 I. PHYSIOLOGY OF LABOUR. Labour is the process by which the fetus, placenta, and membranes are expelled through the birth canal. It is divided into three main stages. 1. Signs of True Labour 2. Hormonal Triggers 🌼 II. STAGES OF LABOUR 1st Stage: Cervical Dilatation (Latent & Active Phase) 🔹 Physiological Changes: 🔹 Midwifery/Nursing Care: 2nd Stage: Expulsion of Baby 🔹