Name	Info	Provider	Link
Prenatal Testing	free resource	MedlinePlus Health Information	https://medlineplus.gov/prenataltesting.html
	free resource	Public Library of Science	https://dx.plos.org/10.1371/journal.pone.0025202
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21998643/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/21998643
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:21998643
	free resource	Biospecimen Research Database	https://brd.nci.nih.gov/brd/paper/plos-one/2011/implementing-prenatal-diagnosis-based-on-cell-free-fetal-dna/11951