Refers collectively to father and mother — parents. Often used in writing or formal documents.
父母の許可を得て旅行に行った。
I went on a trip after getting my parents' permission.
災害時、父母と連絡が取れなくて心配した。
During the disaster I was worried because I couldn't contact my parents.
父母ともに高齢で、介護が必要だ。
Both parents are elderly and need care.