Name Info Provider Link
Pregnancy and Nutrition free resource MedlinePlus Health Information https://medlineplus.gov/pregnancyandnutrition.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=26337632.ui
subscription/membership/fee required Cambridge University Press https://www.cambridge.org/core/product/identifier/S0007114515002184/type/journal_article