Biomedical Basics

Labour and birth

  • Created by Henry Stewart Talks
Published on March 31, 2026   4 min

A selection of talks on Clinical Practice

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The following session will cover labor and birth, focusing on the physiological, hormonal and anatomical changes driving labor and birth, including the distinct phases of labor and key hormones involved. We will examine the mechanics of childbirth, such as fetal positioning and the three stages of delivery. The lecture will also address common signs indicating labor onset, variations in delivery methods, and potential complications. Finally, we emphasize the importance of timely recognition and management to ensure the safety of both mother and baby. Labor and birth mark the culmination of pregnancy, driven by complex physiological, hormonal, and anatomical changes. Labor begins with regular painful uterine contractions leading to progressive cervical effacement and dilation, and ultimately delivery of the fetus and placenta. The process has three main phases, early active and transition, each with distinct contraction patterns and cervical changes. Understanding these phases and childbirth mechanics allows for effective guidance and support of pregnant individuals through this major life transition. Labor begins with the early or latent phase, marked by mild irregular contractions and gradual cervical effacement and slow initial dilation. As labor moves to the active phase, contractions strengthen and become more regular and cervical dilation increases rapidly from about 4 centimeters to seven or 10 centimeters. The transition phase is the most intense with

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