Carbon particles have been found in the placenta of pregnant women who were exposed to air pollution.
This was stated by scientists who were researching on whether air quality that a mother is exposed to, does affect the babies in the womb.
The study, which is still at an early stage, has to determine whether carbon particles can affect the babies in the womb.
The study was published in Nature Communications following the research by a team of scientists from the University of Hasselt in Belgium.
The placenta, which connects the mother with in baby in the womb, needs to be studied in more detail in order for researchers to determine if it absorbs what the mother is exposed to in any phase of pregnancy.