Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
grăvĭdĭtas, ātis, f. [gravidus], pregnancy (very rare; perh. ἅπαξ εἰρημ.); ab eo (Sole) Luna illuminata graviditates et partus afferat maturitatesque gignendi, *Cic. N. D. 2, 46, 119.