parity2

 
Pronunciation: /ˈparɪti/

noun

[mass noun] Medicine
  • the fact or condition of having borne children: the relationship between breast cancer and parity was investigated
  • the number of children previously borne: very high parity (six children or more)

Origin:

late 19th century: from parous 'having borne offspring' (back-formation from adjectives ending in -parous) + -ity