Air pollution has become of the major global problems which reflect negatively on our health. Exposure to air pollution may deliver several harmful diseases. According to a study Air pollution  significantly increase the risk of miscarriages,

Researchers at the University of Utah in the US found that air quality has been associated with numerous adverse health outcomes from asthma to pre-term birth. 

The study, published in the journal Fertility and Sterility, consisted of over 1,300 women (54 per cent Caucasian, 38 per cent Hispanic, and other/missing 8 per cent; average age 28 years). The women in the study sought help at the emergency department following a miscarriage between year2007 to 2015. The  reasearch team examined the risk of miscarriage during a three- or seven-day window following a spike in the concentration of three common air pollutants: small particulate matter (PM 2.5), nitrogen dioxide and ozone.

The results suggest there could be an increased risk for an individual. The team found a 16 per cent increased risk in miscarriage for women exposed to elevated levels of nitrogen dioxide. However, small particulate matter does track with nitrogen dioxide, these results did not significantly associate with an increased risk of miscarriage.