8Cheryl L,Elizabeth S, Sharon W, et al. Systematic review of the literature on postpartum care: Methodology and literature search results[J]. Birth, 2004, 31(3): 196-202.
9Prema Ramachandran. Maternal &child nutrition: New dimensions of the dual nutrition burden[J]. Indian J. Med. Res, 2009, 110(16): 575-578.