C.R.S. § 18-3.5-104

(1) A person commits the offense of unlawful termination of pregnancy in the second degree if the person knowingly causes the unlawful termination of the pregnancy of a woman. (2) Intentionally left blank —Ed. (a) Except as otherwise provided in paragraph (b) of this subsection (2), unlawful termination of pregnancy in the second degree is a class 4 felony. (b) If unlawful termination of pregnancy in the second degree is committed under circumstances where the act causing the unlawful termination of pregnancy is performed upon a sudden heat of passion, caused by a serious and highly provoking act of the intended victim, affecting the person causing the unlawful termination of pregnancy sufficiently to excite an irresistible passion in a reasonable person, and without an interval between the provocation and the unlawful termination of pregnancy sufficient for the voice of reason and humanity to be heard, it is a class 5 felony. (3) A defendant convicted pursuant to subsection (1) of this section shall be sentenced by the court in accordance with the provisions of section 18-1.3-406 .