endogeny
[ en-doj-uh-nee ]
/ ɛnˈdɒdʒ ə ni /
noun Biology.
development or growth from within.
Also
en·do·gen·e·sis
[en-doh-jen-uh-sis] /ˌɛn doʊˈdʒɛn ə sɪs/.