These are all age old regressions that families have been conditioned to follow. While you surley can go to temples but technically sitting for Pujas is disallowed coz prolonged sitting causes issues and with some having heavy flow and no proper saniattaion available in days gone by, it would create to issues and embarrasment. However, as a custom bot sitting for Pujas hads continued. I believe the new bed sheet and stuff rules vary from family to family.