Average length of pregnancy

This topic looks at how the length of pregnancy is measured and what happens around the due date. Reference entries cover pregnancy dating, ultrasound assessment of gestational age, and newborn assessments used to determine gestational age. Others summarize management of preterm labor with intact membranes by gestational age, and describe the physiology of pregnancy.

Recent papers look at how birth timing is recorded and how it has changed. One evaluates gestational age by pregnancy outcomes in Korean claims data. Others report trends in labor induction, with a study of induction in the United States and a Finnish register study of risk factors tied to the rising induction rate. A further paper analyzes termination of pregnancy for medical indications at one center.

Parents often ask how the due date is set, why it can move, and what happens if pregnancy goes past it. An educator may want slides that present the due date as an estimate and explain terms such as post-term in plain language. The papers below are the ones the Hub tracks on this topic.