Long hours standing 'limits baby's growth during pregnancy'

30, June, BBC

Pregnant teachers, childcare workers and sales assistants are among those whose babies are likely to have smaller heads when they are born - implying a slower growth rate.The study, published online in Occupational and Environmental Medicine, examined 4,680 mothers-to-be from early pregnancy onwards.

The women were surveyed on their work conditions and the physical demands of their jobs. The progress of their babies was also monitored through ultrasound and birth measurements.Women who spent a long time on their feet were likely to have babies whose head circumferences were on average 1cm (0.4in) smaller than the norm at birth.Working for long hours also had an effect on fetal growth rate, the study found.

The survey found the quarter who worked more than 40 hours a week had smaller babies than those who worked under 25 hours a week.

Babies born to these women had a head circumference that was 1cm (0.4in) smaller and a weight that was between 148g (2.8oz) and 198g (6.4oz) lower on average than babies born to women working under 25 hours a week.

But working up to 36 weeks of pregnancy has no adverse impact on fetal development, researchers added."Long periods of standing and long working hours per week during pregnancy seem to negatively influence intrauterine growth," the authors conclude.However, Gail Johnson, education and professional development adviser at the Royal College of Midwives, said: "Whilst the finding suggest that there is some difference in the head circumference of babies born to women who stand for long periods, this does not seem to be associated with adverse outcomes."

Nonetheless, she said: "It is important for women to discuss with their employer any concerns they have around their jobs so that a solution to any problems - such as standing for long periods - can be found. I would also encourage women to seek advice from their midwife."