House md q misery within fund of person in charge?

i am watching house and the girl house sees in clinic complained in backbone of head. house goes "that's _____'s sign. you are pregnant".

why would pain surrounded by the back of the head show in a pregnant woman? any assist is appreciated.
Answers:
I like eponyms so I did a bit of searching...He called it "Beccaria's sign" (see link).

This is amazingly obscure and ridiculously nonspecific...jumping to pregnancy is a leap only possible on TV Source(s): http://books.google.com/books?id=v-6108s…
house is crazy you see so copious medical errors on that show it doesn't make make sense but i still love to watch it. once i saw him write his self a prescription for vicodin es 5/500 and signed dr wilson's heading to it. problem is vicodin 5/500 and vicodin es are 2 different drugs and no pharmacy will fill this rx

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