Indiana Code Title 31. Family Law and Juvenile Law § 31-14-7-1

(A) man and the child's biological mother are or have been married to each other;  and

(B) child is born during the marriage or not later than three hundred (300) days after the marriage is terminated by death, annulment, or dissolution;

(A) man and the child's biological mother attempted to marry each other by a marriage solemnized in apparent compliance with the law, even though the marriage:

(B) child is born during the attempted marriage or not later than three hundred (300) days after the attempted marriage is terminated by death, annulment, or dissolution;  or