[The five stages of labour]

Area of Science:

• Obstetrics and Gynecology
• Medical History

Context:

• Current obstetric and midwifery practices utilize a three-stage model of labor (first, second, and third stages).
• Historical medical texts from the 19th century described childbirth in five distinct phases.

Purpose:

• To review the historical evolution of classifying childbirth stages.
• To compare the efficacy of historical five-stage versus current three-stage models of labor.

Summary:

• The five-stage model included phases for early labor, cervical dilation, fetal head descent, active expulsion, and placental delivery.
• The current three-stage model emerged with mid-20th-century developments, including distinctions between latent and active first-stage labor.
• The historical five-stage subdivision is suggested to be more beneficial for understanding and documenting the dynamic process of birth.

Impact:

• Highlights how clinical and research interests shape medical classifications.
• Suggests a potential benefit of revisiting historical models for improved clinical documentation and understanding of childbirth dynamics.