Leviticus 12:3

The law here pronounces women lying-in ceremonially unclean. The Jews say, "The law extended even to an abortion, if the child was so formed as that the sex was distinguishable." 1. There was some time of strict separation immediately after the birth, which continued seven days for a son and fourteen for a daughter, Lev 12:2, Lev 12:5. During these days she was separated from her husband and friends, and those that necessarily attended her were ceremonially unclean, which was one reason why the males were not circumcised till the eighth day, because they participated in the mother's pollution during the days of her separation. 2. There was also a longer time appointed for their purifying; thirty-three days more (forty in all) if the birth were a male, and double that time if a female, Lev 12:4, Lev 12:5. During this time they were only separated from the sanctuary and forbidden to eat of the passover, or peace-offerings, or, if a priest's wife, to eat of any thing that was holy to the Lord. Why the time of both those was double for a female to what it was for a male I can assign no reason but the will of the Law-maker; in Christ Jesus no difference is made of male and female, Gal 3:28; Col 3:11. But this ceremonial uncleanness which the law laid women in child-bed under was to signify the pollution of sin which we are all conceived and born in, Psa 51:5. For, if the root be impure, so is the branch, Who can bring a clean thing out of an unclean? If sin had not entered, nothing but purity and honour had attended all the productions of that great blessing, Be fruitful and multiply; but now that the nature of man is degenerated the propagation of that nature is laid under these marks of disgrace, because of the sin and corruption that are propagated with it, and in remembrance of the curse upon the woman that was first in the transgression. That in sorrow (to which it is here further added in shame) she should bring forth children. And the exclusion of the woman for so many days from the sanctuary, and all participation of the holy things, signified that our original corruption (that sinning sin which we brought into the world with us) would have excluded us for ever from the enjoyment of God and his favours if he had not graciously provided for our purifying.

Cross-references: Lev 12:2 · Lev 12:5 · Lev 12:4 · Gal 3:28 · Col 3:11 · Ps 51:5