gestate

verb

1. (intransitive)To carry offspring in the uterus from conception to delivery.

   “In the early 1960s, a study was conducted in which gestating rats were given diets containing the same mineral content of mineral salts or amino acid chelates.”

2. (broadly, intransitive)To develop an idea.

   “Philip wondered at that five-year gap. Perhaps it simply proved that a work of genius takes longer to gestate than a work of mere competent brilliance.”

   “Barnett is not currently working on a novel. "Something is gestating in my head," he says, "but I am not yet sure if I have one character or two."”