Working night shifts reduces female fertility. That is the conclusion drawn by researchers at Harvard University. The results were published in the journal Occupational and Environmental Medicine.
Researchers surveyed 500 women who applied to the Massachusetts Hospital with complaints of fertility problems. Women have gone through in vitro fertilization procedure. One of its stages is to stimulate superovulation to produce several eggs. The women who worked during the day, produce an average of 11.2 eggs. Women who worked at night - 8.7 eggs, 28% lower. In women who had to work to lift weights, the number of eggs was reduced by 14%.
The study's authors believe that the reason for the shooting down of night work daily rhythms. Night life is unnatural for human beings and leads to various complications - including, as it turned out, and reduced fertility. The researchers recommend that pregnant women who want to try not to work at night and do not carry weight.