Is it normal that men can still produce life at 54 years old?

Recently my 54 years old uncle married a 28 years old woman (it is okay here in Ireland). He had a son last week. I am wondering if it is still possible for men to have offspring at such later stage.

Damn it! What other quadrillions of biological advantages do men have XD

Is it normal that men can still produce life at 54 years old?
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