Limitation on duration outside US after naturalization

[immihelp]

My wife is scheduled for her Naturalizaton Interview three weeks from now. After she becomes a citizen, is there a limit on how long she can remain out of the country? Her parents, in the Philippines, are aging and in poor health. We need to go there for an extended visit but would like to know if there is a limit on how long she can stay there if we go during the first few months after obtaining her citizenship.

Thank you for any information you can supply us.

[immihelp]

After you become US citizen and get US passport, you can stay out of the US as long as you like. No limitations.