In lev. 15 it deals with a woman's issue of blood. Here is the passage in question. Lev 15:30 And the priest shall offer the one [for] a sin offering, and the other [for] a burnt offering; and the priest shall make an atonement for her before the LORD for the issue of her uncleanness. The passage requires a sin offering. Also there is the same requirement after having a child. My question is what sin has been committed here? Why a sin offering. Can anyone shed any light on this? The same requirement is commanded for a woman having a child in chapter 12 so what is the sin in either or both cases?