About: http://webisa.webdatacommons.org/15144562

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	Those tests pick up the hormone for pregnancy that has to be there to sustain the pregnancy. anyway, periods can indeed be late for a variety of reasons including stress.
http://www.w3.org/ns/prov#wasQuotedFrom	medhelp.org