Hilary W. Hoynes, Douglas L. Miller, and David Simon, UC Davis, 2013. Researchers examine the 1993 EITC expansion to measure the effect the extra income has on rates of low birth weight. They found that while the EITC is not a health program, it does have a clear impact on newborn health.
http://poverty.ucdavis.edu/sites/main/files/file-attachments/policy_brief_hoyes_eitc_0.pdf