The GENESIS study prospectively assesses the use of Fetal Head Circumference (FHC), measured using ultrasound in the late third trimester, as a predictive tool for labour dystocia and intrapartum caesarean section. Recruitment commenced in October 2013.


The aim of the GENESIS study is to investigate whether fetal head circumference either alone or in combination with other measurements or factors can identify women who might need an unplanned caesarean section once labour has begun.

We do not have any test at the moment which can predict who will require an emergency caesarean section. The study aims to look at certain patient information such as height and weight and the measurements of the baby between 39+0 and 40+6 weeks gestation to see if any of these measurements can be used in clinical practice to predict who will require a caesarean section or instrumental delivery.

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