Search Result for "anovulation": 
Wordnet 3.0

NOUN (1)

1. the absence of ovulation due to immaturity or post-maturity or pregnancy or oral contraceptive pills or dysfunction of the ovary; 



WordNet (r) 3.0 (2006):

anovulation
    n 1: the absence of ovulation due to immaturity or post-maturity
         or pregnancy or oral contraceptive pills or dysfunction of
         the ovary [ant: ovulation]