Leviticus 12 - G. Campbell Morgan's Exposition on the Whole Bible

In this brief section, which deals with the beginning of life, the religious aspect of childbirth is most unquestionably the permanent value. The separation of the woman from the congregation for a period is the suggestion of the recognition of the fact that the race is sinful and of the necessary consequence that every child is born in sin.

The return of the mother to her place in the privileges of worship could be brought about only by the presentation of sin and burnt offerings. While these requirements kept fresh in the mind this sense of sin, the provision of a way of return spoke in the language of hope. If men are born in sin, through expiation and devotion a way is yet made for their restoration to the place of communion with God. Thus at the beginning of every life the appalling need and the gracious provision were brought freshly to mind.