abortivity

From abortive +‎ -ity.

abortivity (uncountable)

1. (chiefly non-native speakers' English) The quality of being abortive.

   Synonym: abortiveness

   • 1918, American Journal of Physical Anthropology, volume XIX, New York, N.Y., →ISSN, →OCLC, page 176:

     Abortivity is very high in the first month of gestation, decreases rapidly in the others and slightly increases just in the period close preceding the birth.