1) Development 2) Growing 3) Growth 4) Maturation 5) Ontogenesis 6) Ontogeny 
(from the article `poison`) Teratogenesis is a prenatal toxicity characterized by structural or functional defects in the developing embryo or fetus. It also includes ... If a drug is intended for use during pregnancy or in women of childbearing potential, animal reproductive and developmental toxicity studies are ... ...into the tes...
The origin or mode of production of a malformed foetus; the disturbed growth processes involved in the production of a malformed neonate. ... Origin: terato-+ G. Genesis, origin ... (05 Mar 2000) ... 
(ter″ә-to-jen´ә-sis) the production of deformity in the developing embryo; called also teratogeny. adj., teratogenet´ic., adj.
Teratogenesis is the production of non-heritable birth defects.
Type: Term Pronunciation: ter′ă-tō-jen′ĕ-sis Definitions: 1. The origin or mode of production of congenital anomalies; the disturbed growth processes involved in the production of a malformed neonate.
[n] - the development of defects in an embryo
teratogenesis, teratogenetic, teratogenic, teratogeny The production of monsters or misshapen organisms.
The introduction of nonhereditary birth defects in a developing fetus by exogenous factors such as physical or chemical agents acting in the womb to interfere with normal embryonic development. 
noun the development of defects in an embryo