Ko te whakatupu kikiri i roto i te taiao whakamarumaru. Hei tauira, ko te pūrere awhi i te taiwhanga pūtaiao; ko te noho a te manu ki te whakamahana i āna hua i rō kōhanga.
To develop an embryo in favourable conditions. For example, in a laboratory incubator, or a bird sitting on its eggs in a nest to provide heat for their development.