These verses explain the rules about childbirth. Any bodily discharge, including blood, was "abnormal" because it weakened the person and made them ceremonially unclean (see study notes on Leviticus 5:3; 11:1–15:33). These verses focus on the discharge that comes with childbirth, not childbirth itself (12:2, 5, 7). The uncleanness was not sinful unless they ignored it and it came into contact with something holy (see 5:2–3).