fecundity

noun4

1. •
   Ability to produce offspring.
2. •
   Number, rate, or capacity of offspring production.

   • The soil spawned humanity, as it bred frogs in the Rains, and the gap of the sickness of one season was filled to overflowing by the fecundity of the next. — 1889
3. •
   Rate of production of young by a female.
4. •
   Ability to cause growth or increase.