Name	Info	Provider	Link
Twins, Triplets, Multiple Births	free resource	MedlinePlus Health Information	https://medlineplus.gov/twinstripletsmultiplebirths.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=33955455.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33955455/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33955455
	free resource	scite Smart Citations	https://scite.ai/reports/33955455
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/hmg/article-lookup/doi/10.1093/hmg/ddab121