The answer is that if [s]he's about half a foot away, the gravitational force he exerts is about the same as the largest planet in the solar system. That's the best case. Jupiter could actually be as far away as ~7 a.u. from earth at the instant you're born, in which case the obstetrician can be in the room next door and pull more g's your way.
You could probably not ask that question any more, what with "products of conception," how they get in there, and where they come out and what-not.
I was going to respond to your post but after consulting my star charts.../s
Having worked in the medical field for ever, the effect of the lunar phase is remarkable. I wonder just how fat your obstetrician would have to be to compare?
Lastly, if you have ever seen the birth of a big headed baby who is sorta stuck in the birth canal and the suction cup they use to pull on their noggins...
Well, this has nothing to do with the original post so, g’night.
My first physics professor (and probably every physics and astronomy professor I had after that) made exactly the same point: The burden of proof is on the astrologer to identify the mysterious agency (or force) the stars supposedly exert on us at birth to guide our lives. It’s not gravity. After thousands of years claiming such a force exists, astrologers are no closer to identifying it, characterizing it, or even doing simple experiments on it to learn what characteristics it does have. They’re not even trying. They want us to believe astrology is a science, but that you can’t do experiments in it because it’s outside the realm of science, lol. Astrology is pure bunk, pure crapola, and people should stop reading astrology books and the astrology section of the newspaper and put the charlatans out of business.