About: http://webisa.webdatacommons.org/207548798

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	So if you rule out menstruation too, this basically means that if you are TTC you should not use it at all.Here is a sampling of the different advice that various websites give about when and how often to use them.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com