I would start with the Data Error Report which has many data error categories eg children out of birth order, mother less than 13 etc. See the attachment.
As with all FTM reports, you can run it for focus person/family, all individuals or selected individuals which brings in the FTM filter into play.
You aim should be zero data errors for all individuals in every category :-)
I would also have a look at these two articles in the FTM Knowledge Basehttp://ftm.custhelp.com/app/answers/detail/a_id/4316/kw/data...http://ftm.custhelp.com/app/answers/detail/a_id/1574/kw/data...
The Data Error Report is one of the gems in FTM both Windows and Mac. Use it often.