Well yeah, a pee-on-a-stick test is redundant, innit?

It IS a weird thing to have in a DW storyline - and as such you know it can't end well (on screen anyway). The fact that the idea of a creche in the TARDIS is just plain daft is one of the reasons I don't really "do" babyfic, You can't run around saving the universe when you've got to stop for a feed every few hours!