Abstract
What is already known about this topic? To reduce the high prevalence of neural tube defects (NTDs) in rural areas of the country, the Ministry of Health of China (currently known as the National Health Commission) initiated a nationwide folic acid supplementation program in 2009. The prevalence of NTDs have decreased from 118.9/10,000 births to 31.5/10,000 in northern China from 2000 to 2014. What is added by this report? Based on a population-based birth-defect surveillance system, the prevalence of selected structural birth defects in 5 counties in northern China decreased significantly from 182.8/10,000 births to 119.3/10,000 during the past two decades. Perinatal (28 gestational weeks or more) structural birth defects decreased from 83.9% of total birth defects in 2000 to 59.9% in 2019. What are the implications for public health practice? Improving the compliance of periconceptional folic acid supplementation, the fortification of staple foods with folic acid, and the health education surrounding early prenatal check-ups should be considered to further reduce the risk of birth defects in the population.