gestate.

Pronunciation: \ˈjes-ˌtāt\
Function: verb
Inflected Form(s): ges·tat·ed; ges·tat·ing
Etymology: back-formation from gestation
Date: 1858

transitive verb:
1 : to carry in the uterus during pregnancy
2 : to conceive and gradually develop in the mind

intransitive verb : to be in the process of gestation