Glossary of abbreviations used:

BS: Before sunrise

MY: Monthly rule.

MN: Median rule

IL: Interval rule.

Period 1.

If she saw blood for the first time on Wednesday, the 12th of Nissan: (with a single period there is no interval, therefore column 3 is not marked.) The following should be marked in column 5: - 11th of lyar - because of the Median rule (which is 30 days), 12th of lyar because of the Monthly rule (since she had a period on the 12th of Nissan).

Period 2.

The second period came earlier than expected, on Tuesday, the 9th of lyar (which is before the dates noted in column 5 of period I). The following should be marked in column 3,: - 28 - which is the length of her interval (including the starting days of both periods). Column 5 should be marked as follows: - 12th of lyar, - marked in period I which she still must anticipate (as explained in Rule 4, if the bleeding previously stopped. If the bleeding did not stop yet, she must expect the period to arrive next month on the 12th of Sivan), - 7th of Sivan because of the Interval Rule (which is the 28th day), - 9th of Sivan because of both the Monthly and Median Rules (because in our example, they both fall on the same day), (and, according to those authorities who require anticipation of the 31st day, also the 10th of Sivan).

The third time, the period was delayed until Motzei Shabbos, the night belonging to Sunday, the 13th of Sivan (before sunrise) [the due dates listed at period 2, column 5 are annulled since no bleeding has occurred on those days.] Column 3 should be marked-34-the length of the interval, and column 5 should be marked- 12th of Tammuz- because of the Median rule,-13th of Tammuz- because of the Monthly rule,-16th of Tammuz- because of the Interval rule (the 34th day from her period.)