Length of pregnancy can vary by up to five weeks

A report by scientists has discovered something that we have been teaching with hypnobirthing for years now – that the length of pregnancy differs from woman to woman and can be as much as five weeks out!

The report confirms what we have always known at Reading Hypnobirthing:

Although it has always been known that human pregnancies usually last between 37 and 42 weeks, the variation has previously been attributed to imperfect methods of estimating due dates.

A woman’s due date is calculated as 280 days after the onset of her last menstruation and is only ever considered a best guess. Only four per cent of women deliver on their due date and only 70 per cent within 10 days of it. 

However researchers from the National Institute of Environmental Health Sciences (NIEHS) were able to pinpoint the moment women became pregnant by taking daily urine samples – enabling them to isolate the role that natural variation plays in pregnancy length.

In a group of 125 women, they found the average time from ovulation to birth was 268 days – 38 weeks and two days – and that the length of pregnancies varied by as much as 37 days, according to the research, published today in the journal Human Reproduction.

To read the full article that reinforces our Hypnobirthing message that – BABY COMES WHEN BABY IS READY!