Name Info Provider Link
Pregnancy and Nutrition free resource MedlinePlus Health Information https://medlineplus.gov/pregnancyandnutrition.html
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21786020/
subscription/membership/fee required Springer https://dx.doi.org/10.1007/s00394-011-0226-z
free resource Europe PubMed Central https://europepmc.org/abstract/MED/21786020