If you are trying to conceive for some time now and nothing seems to work, you should analyze your job also. A new study reveals that women who are having challenging jobs that take physically effort or working in shifts may have bigger problems to conceive than women with regular jobs.

Lidia Mínguez-Alarcón, a researcher from Boston lead a study that shows the impact of physical exertion over the body’s ability to conceive. Even though multiple studies have shown over the last years an obvious link between the workplace and pregnancy, this is the first research that also observes and monitors the hormone levels and ovarian function.

The survey involved 473 women with an average age of 35 that were currently undergoing infertility treatment and they were asked about the working conditions and physical requirements. The data was analyzed in order to see if there is a connection between these factors and infertility. Four in ten women admitted their work involves heavy lifting and one in four said her job is physically challenging. As for the non-day shifts, the study reveals that this occupational requirement is even more dangerous for the production of egg and the quality of the released eggs, compared with other women with a normal working schedule, at the same age and weight.

The study conducted by Lidia Mínguez-Alarcón is only observational, so no official conclusions can be stated after the analysis, especially that more aspects of the occupational factors need to be addressed: night shifts versus day shifts or simply working long hours.