About: http://webisa.webdatacommons.org/319630418

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	1990s Advances in the technology of pregnancy tests included the development of new types of antibodies and the use of enzyme labels in place of radioactive labels.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov