Conn. Gen. Stat. § 46b-45a: Allegation of pregnancy in pleadings. Disagreement as to parentage. Hearing.

(a) If, during the pendency of a dissolution or annulment of marriage, a spouse is pregnant, such spouse may so allege in the pleadings. The parties may in their pleadings allege and answer that the child born of the pregnancy will or will not be a child of the marriage.

(b) If the parties to a dissolution or annulment of marriage disagree as to the parentage of the spouse who did not give birth to the child born of the pregnancy, the court shall hold a hearing within a reasonable period after the birth of the child to determine parentage.