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Prolonged pregnancy and induction of labour 

Prolonged pregnancy and induction of labour
Prolonged pregnancy and induction of labour

Sambit Mukhopadhyay

, Edward Morris

, and Sabaratnam Arulkumaran

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date: 02 August 2021

The median duration of pregnancy is 280 days, and the phrase ‘term’ refers to a pregnancy of 37 completed weeks onwards. Without intervention, 5–10% of women give birth after 42 weeks and are defined as ‘post-term’. This figure—and the risk of subsequent unnecessary intervention—has been reduced by routine ultrasound scanning in early pregnancy. The chapter covers risks to mother and baby of prolonged pregnancy, management options and indications for induction, and methods and complications of induction.

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