About: http://webisa.webdatacommons.org/218850838

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	I have actually heard the opposite--that it is more likely in a first pregnancy, and more likely when the baby is a boy.
http://www.w3.org/ns/prov#wasQuotedFrom	mothering.com