This is really all i have to say about birth control, first of all i figured i was up against his scv rush or zergling rush because i've played him many times and i have reps of him doing it to me and gettin screwed because of them.  Secondly I ctrl click when i search and dont bother following my scv along, if you look at the rep you will see that I never actually found his main and dunno how he even thought I found it.  Once I saw his drone in my base I kept my scv at the entry to my base to see when the lings were coming.
I'd like to talk to a admin about this because this is a legit win and it's not my fault he only has a couple different strategies and i'm sure if you look at his replays you will see the strategys I'm speaking of.