Anatomy & Physiology › Section Y · Reproduction and development › Topic Y.6
Pregnancy, labour, and birth
Pregnancy reshapes almost every system of the pregnant person's body, mostly under the control of placental hormones. At the end, a shift in those hormones and a positive feedback loop drive the contractions of labour and birth.
In this topic
- How long a pregnancy lasts
- Worked example: estimating a due date
- The hormones that sustain pregnancy
- Metabolism and weight
- The heart and blood
- Worked example: why hematocrit falls
- Breathing, digestion, kidneys and skin
- What starts labour
- Labour as positive feedback
- The three stages of labour
- Common mistakes to avoid
- Key takeaways
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