@Khandro - Now you are just being stubborn. As with all things in life, there are degrees of belief, or disbelief, come to that. You have a spectrum of belief in different types of god both within and between the major different churches, ranging from an absolute belief in the literal truth of the bible, young earth creationism, and noahs ark, all the way down to the rather more pragmatic belief of the CofE, who accept the science, and just claim that "god" is the motivating force.
On that basis alone, your analogy between faith and pregnancy is an absolute fail.
And of course, there are shades and degrees of atheism. Some atheists, when asked, do not believe in an Abrahamic god, but do believe in some kind of universal creator, spinozas vision of god. Then you will get atheists who have no belief in any sort of supernatural deity at all, abrahamic or otherwise, because on the balance of probability and reason, such a being would be very very unlikely.
The only people struggling with these concepts of atheism are those like yourself, who wish to impose your own definitions of atheism on everyone else.