Women who work more than 40 hours a week or routinely lift heavy loads may take longer to get pregnant than women who don’t, a US
Researchers followed 1,739 nurses who were trying to get pregnant and
estimated 16 per cent of them failed to achieve this goal within 12
months, and five per cent still hadn’t conceived after two years.
Working more than 40 hours a week was linked with taking 20 per cent
longer to get pregnant compared to women who worked 21 to 40 hours.