Study Components

What were the components of the study?

The interviewers asked women about their pregnancy experience and health. There is no way to recreate the many events and exposures that happen during pregnancy—only women could give us this information. After the interview, the study researchers sent small brushes to each family for collection of cheek cells from mothers, fathers, and babies. Cheek cells contain genetic material called DNA, which we used to examine the role that genetic factors play in the development of a baby.