There is always some bitter twist of fate with these types of questions.
The person you don't know (:::cough::: yet) who dies? ... Your unborn child.
I notice that a lot of people want to turn this into some kind of double cross. Why is that? Do you want to give an extra reason to not push the button? Why?
I think a lot of you are reading the question and thinking that might want to push the button. You've realized that you value a big dick more than human life and that frightens you. So you want to come up with another reason why you can't push the button. Interestingly enough the reason to not push the button becomes just as selfish as pushing the button.