Sofia Vergara -- Nick Loeb Screwed Himself TWICE On Frozen Embryo Deal

Sofia Vergara is ripping her ex-fiance Nick Loeb ... reminding him he had TWO chances to change the terms of their frozen embryo contract -- and didn't -- so he's got no one to blame but himself.
Sofia went on "The Howard Stern Show" Monday morning and laid out her position on the legal battle with Loeb ...