How the World Became Awash in Synthetics
During the crucial early weeks of pregnancy, when fetal cells knit themselves into a brain and organs and fingers and lips, a steady flow of man-made chemicals pulses through the umbilical cord. Scientists once believed that the placenta filtered out most of these pollutants, but now they know that is not the case. Along with nutrients and oxygen, numerous synthetic substances travel to the womb, permeating the fetus’s blood and tissues.