<Li> Probable labour induction </Li> <Li> Death (if the baby stayed for too long, see Maternal death) </Li> <P> The causes of post-term births are unknown, but post-mature births are more likely when the mother has experienced a previous post-mature birth . Due dates are easily miscalculated when the mother is unsure of her last menstrual period . When there is a miscalculation, the baby could be delivered before or after the expected due date . Post-mature births can also be attributed to irregular menstrual cycles . When the menstrual period is irregular it is very difficult to judge when the ovaries would be available for fertilization and subsequent pregnancy . Some post-mature pregnancies are because the mother is not certain of her last period, so in reality the baby is not technically post-mature . However, in most countries where gestation is measured by ultrasound scan technology, this is less likely . </P> <P> Once a baby is diagnosed post-mature, the mother should be offered additional monitoring as this can provide valuable clues that the baby's health is being maintained . </P>

What are the causes of post term pregnancy
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