A man who said to his wife: when you menstruate you are divorced

Amir and al-Hakam (may Allah have mercy on them) said: If a man says to his wife, "When you menstruate, you are divorced," and then her menstruation stops and she becomes pregnant, the man may have intercourse with her until she menstruates.

Amir said: If it is valid in the near term, then it is valid in the distant term as well.