The backbone of the CIDR is a nylon spine covered by a progesterone (1.38 g) impregnated silicone skin. During the seven days in the vagina the CIDR releases a relatively constant dosage of progesterone. Upon removal of the insert, progesterone is quickly eliminated.
variant. an organism or tissue that is different from the majority of the population but is still sufficiently similar to the common mode to be considered to be one of them, e.g. a variant strain of classical swine fever (hog cholera) virus. 1  Facebook.
1. Differing from others of the same kind or from a standard: a variant form of the disease; a book in variant editions. 2. Having or exhibiting variation; varying: a procedure producing variant results. n. Something that differs from others of the same kind or from a standard, as a different spelling or pronunciation of a word.