Is it permissible for a woman to stipulate at the time of entering ihram for 'Umrah that her 'Umrah would be waived if menstruation began?

Question:
Honorable Shaykh, may Allah grant you success, a woman wants to perform 'Umrah and fears that her period will start. If she makes a stipulation when entering ihram, is her 'Umrah waived if her period starts?

Answer:
Menstruation is not a temporary impediment; it is not a temporary impediment because it is a regular occurrence that comes to every woman. It is not a temporary impediment, unlike an illness, an enemy attack, or something else that is not temporary. This is a known matter for a woman. So, praise be to Allah, she enters ihram for 'Umrah or Hajj, and if her period starts, she refrains from tawaf until she becomes pure. This is what the Prophet (peace and blessings be upon him) commanded: "Do not perform tawaf around the House until you become pure." Yes.