The NHBCS investigates how environmental contaminants impact the health of pregnant women and their children. The study recruited women who were pregnant at the time of recruitment, aged 18 to 45 years, who were receiving routine prenatal care at one of the study clinics, and were living at a residence served by a private water system. The study population was predominantly white, with an average age of 31.3, and primarily full-term pregnancies (> 37 weeks) with an equal male/female distribution of births. Since 2009, over 1,500 women and 1,500 children from New Hampshire and Vermont have participated in this longitudinal study.

Recruitment is ongoing