Do they have to be Master Doctor or is trainee or adept good enough?

I never thought about "nothing checked" and will do that now.

I just started a new "hard" game and one of the children was 13 and one 14 - it was the good news and the bad news LOL - but as they were all female as soon as they were old enough to work I put them on research. The lone male has done nothing but learn doctoring. It is a new stratagy I am trying. Oh and I took the oldest female and mated/breed her so I would have someone to help collect.