Long hours could increase infertility risk for women

Women routinely working over 40 hours a week or regularly lifting heavy loads could find it more difficult to get pregnant, a new study has suggested.

Researchers at Harvard Medical School, Harvard School of Public Health, and the Centers for Disease Control and Prevention in the United States, found that working more than 40 hours a week was linked with a 20 per cent increase in the time taken to get pregnant, compared to those working 21 to 40 hours.

The research surveyed 1,739 female nurses between 2010 and 2014, all of whom said they were looking to conceive.   

Half of the respondents were at least 33 years old, while 44 per cent were overweight and 22 per cent were current or former smokers.

Around one third said their work meant they were on their feet for at least eight hours a day, while some 40 per cent said they were responsible for lifting heavy loads up to five times a day.

An estimated 16 per cent of respondents did not become pregnant within 12 months, while another five per cent still could not conceive after two years.ADNFCR-2094-ID-801797902-ADNFCR