The study analyzed the effects of terminating pregnancies before 28 weeks gestation on the prevalence of neural tube defects (NTDs).
During 2004-2010, data from Shanxi province showed a total of 52,366 births and 485 NTD cases, revealing that terminations accounted for a significant percentage of NTDs that would otherwise go uncounted.
The findings suggest that existing birth defect surveillance systems need to include pregnancies terminated early to more accurately reflect the prevalence of NTDs, especially anencephaly.