I never thought of that! Back when I rode mostly human powered bicycles.....I wore out the front chainrings on one of my mountain bikes and the chain would skip a few spaces on the chainring.
Here's an article that you can use to make sure your chainrings aren't worn out.
BlueWheel - Bicycle Mechanix - ChainCare
Increasing the tension on the chain will fix this short term if in fact the chainrings are worn out...if the chainrings *aren't* worn out....you've fixed your problem :-)