In the case of two or more night shifts per week, the pregnancy can endanger: In a large Danish study showed that night-time working women in the following week, more likely to miscarriage than Pregnant women with an undisturbed rhythm.
Women who had worked in the previous week two or more night shifts, had a 32 percent higher risk of miscarriage than women who had not worked in the previous week, in the night. The risk increased both with the number of weekly carried out in night shifts, as well as with the number of consecutive night shifts. Especially from the eighth week of pregnancy, the relationship between night work and the risk of miscarriage was observed.
Since about 14 percent of the women in Europe work at least once a month at night, the results for both pregnant women as well as for employers, Doctors and midwives to be relevant, according to the authors: "The results could have an impact on the national occupational health regulations."
Women are exposed to during the night shift of light, which disturbs the circadian rhythm and the release of Melatonin is reduced. Melatonin is important for maintaining a successful pregnancy.
For the study, the authors retrieved data from 22.744 pregnant Danish women in the public service, especially in hospitals, and with data from national registers of births and hospital stays linked because of miscarriages. In order to identified, how big is the risk for a miscarriage between the fourth and 22. Week is and how to do this due to night work is affected.