Is it obligatory for a woman to observe the iddah (waiting period) at home after a divorce from an urfi (customary) marriage, considering that she cannot conceive and no one knows about her marriage?

The obligation of the 'iddah (waiting period) is a legal ruling that applies after divorce following consummation or the death of the husband. This ruling does not change based on the woman's condition. The wisdom behind the 'iddah is not solely to ascertain the emptiness of the womb; rather, it has other purposes, including demonstrating the gravity of the marriage contract and its status as a solemn covenant. Therefore, lack of procreation or people's unawareness of the marriage does not affect the obligation of the 'iddah. The woman in 'iddah must observe it in her home and is not permitted to spend the night elsewhere except out of necessity. However, going out during the day is permissible for a need.