Women who work multiple shifts at the same job will have trouble sleeping, have irregular periods, and may have trouble conceiving because of this job..

Women who worked multiple shifts at work took longer to conceive and were more likely to have irregular periods, according to an interesting study.. Study women who only went to work on the night shift had no problems conceiving but had more miscarriages.

The experts analyzed a number of studies on this topic, conducted since 1969, and the data concerned 119,345 women.. They found that women who worked different shifts—day, evening, and night—were at higher risk of fertility problems, meaning they were unable to conceive over a 12-month period, compared with women who were tested, who always worked the same day shift..

The results clearly demonstrated that women who worked multiple shifts also had a 33 percent higher risk of irregular periods..

Women who only worked at night had a 29% higher risk of miscarriage.

Previous studies have linked shift work to persistent sleep difficulties and frequent health problems, but few studies have looked at the effects on fertility and a woman's ability to conceive effectively..

Dr. Linden Stoker, study leader, said the study did not determine why multi-shift work was associated with a negative effect on fertility, but added that the explanation was likely that it disrupts the body's natural "