During all the days when a zav experiences zav discharges, he is ritually impure. When the zav discharges cease, he counts seven clean days, like a zavah must, immerses himself on the seventh day, and waits until nightfall. On the eighth day, he brings his sacrifice if he had experienced three discharges.
If he experienced a zav discharge even at the end of the seventh day after he immersed himself, he negates his entire counting and must begin to count seven clean days from the day of his last discharge.

When a zav has a seminal emission during the seven clean days he counts, he only nullifies that day. From the following day onward, he completes the seven days and then brings his sacrifice.
What is implied? He had a seminal emission on the fifth day, He counts another three clean days afterwards, immerses himself on the third day and brings his sacrifice on the fourth day.

When a zav checks himself on the first day of his counting and finds himself pure and does not check himself for the remainder of the seven days until the seventh day when he checks himself and finds himself pure, he may rely on the presumption that he is pure. Even if he checked on the day when he had an impure discharge and saw that he was pure and that the discharge had ended and he did not check himself throughout the seven days, but did check himself on the seventh dayor the eighth day, should he find himself pure, the days of counting are significant and he may rely on the presumption that he is pure.

Any discharge that causes the counting of the days to be nullified does not bring about an obligation for a sacrifice.
What is implied? A man experienced two discharges and then had an interruption for a day or two and thus he began counting his seven clean days. Although he experienced a zav discharge in the midst of the seven days, it is not combined with the previous two. Instead, it nullifies the counting and he must begin to count over again, as we explained.
Moreover, even if he experienced three consecutive discharges in the midst of the counting - even if he experienced them on one day, and even if that was on the conclusion of the seventh day of the seven clean days - he should not bring a sacrifice. For these discharges are considered as nullifying the clean days that were being counted. If he experienced three discharges on the night of the eighth day, he must bring a sacrifice, because these discharges do not nullify the previous counting.
To whom does the above apply? To a zav who has experienced two discharges. A zav who experienced three discharges previously, by contrast, who experiences three discharges on the eighth night after the seven clean days does not bring a second sacrifice because of these three discharges, only one sacrifice for the first three discharges. Although these three discharges do not nullify the clean days that were counted, the man has not entered a time when it is fit for him to bring a sacrifice, since the preceding night is considered as "lacking in time,⁠" with regard to all Torah laws, with the exception of a woman after childbirth who miscarried on the night of the eighty-first day. She brings a second sacrifice, as we explained. This concept was communicated by the Oral Tradition.

If a man experienced one discharge on the eighth night and two discharges on the eighth day, they are linked together and he is required to bring a sacrifice because of the two latter discharges. The rationale is that a zav's first discharge is considered as a seminal emission. If he experiences two others afterwards, it is combined together with them to obligate him for a sacrifice. If, however, he experienced two discharges on the eighth night and one on the eighth day, they are not linked together and he is not required to bring a second sacrifice because of the latter zav discharges.

Every male can contract zav impurity, even an infant on the day of his birth, a convert, a servant, a deafmute, and an intellectually and/or emotionally unstable person. It appears to me that atonement is brought for them so that it is possible for them to partake of sacrificial food. Their sin-offering should be eaten, for they are like a child who is not intellectually capable.
A person who was castrated or one who is born sexually impotent may contract impurity because of a zav discharge like other men.

The stringencies that apply both to males and females are placed upon a tumtum and an androgynus They contract ritual impurity because of uterine bleeding like a woman or because of clear discharges like a man. Their impurity is of questionable status. Therefore if one such person had three zav discharges or discovered zavah bleeding for three consecutive days, he must bring a sacrifice, but it is not eaten. If he was counting seven clean days to purify himself from a zav discharge and he experienced uterine bleeding or he was counting to purify himself from uterine bleeding and experienced a zav discharge, the counting is not disrupted.