A friend of mine actually said that god decided it was time for her to have a baby.
My mom's pregnancy with me was very high risk. Risky enough to have been strongly urged by her doctor to have an abortion and this was before abortion was legal in the States in all but the most extreme of medical risk cases.
The way Mom always told it, "God and I talked it over for about 5 seconds and I decided to go ahead with the pregnancy."
Eyerolling, creepy. Though I guess I've gotta be grateful for whatever psychological method she used to take that big risk because ... here I am.
But there are so many unknown variables between every one of us and oblivion, we only pick out ones like that because they're so vivid. If your father had eaten one more pea at dinner nine months before you were born, another sperm would have won the race and "you" would be "someone else" or no-one at all, and so it goes. (I know if safe aborton had been available I wouldn't be here, but that doesn't bother me a bit, let alone have any effect on my views about abortion.)
Actually as dialogues with God go, and as reasons for deciding go, I find your mother's one of the less creepy. More likely to give a rational result than tossing a coin, since "the God within" is quite likely to be on her side.
Everyone talks about how I'm a miracle baby because my mother rarely ovulated and my father had a low sperm count. I'm the only one who argued that the conditions just happened to be right that one Valentine's Day twenty-four years ago when my mother was too cheap to give a real gift. XD