I would think it would be much more dangerous for the baby due to the way that fluids stick to objects rather than fall away.

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You have a couple of recent posts which are of a much more rambly and long bent than your usual style, with a different tone to the writing and less capitalization and grammar errors. Have you been using AI to write your recent posts? Please don't do that on a place where people are trying to get actual answers like ELI5.

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It's also important to note that the baby (well before birth) will flip upside down as a result of gravity. Without gravity the likelihood of a breach birth (feet first) is very high, and a breach birth is very dangerous.

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This is interesting and I could see how the weak gravity could cause biological problems like fetal orientation. Experimentally, I’m sure it’s (obviously) never been measured.

I think we’re also assuming the entire pregnancy was experienced in zero g. If the mother experienced a change g-force… that baby is gone. There are too many added biological variables to assume things would go right.

I also know nothing about the details of embryonic cell development. Hopefully someone with more insight can help us out. Is the place where a fertilized cell attaches to the uterine wall random?

Given there have been no zero G pregnancies, do we actually know this?

Yes, because we can change the direction of gravity on pregnant women. It's called having them lay down for extended periods of time

I'm not sure how random the placement of the embryo is, but I do know it can attach in the fallopian tube (ectopic pregnancy) and it can attach to either the front or back of the uterus, which affects how much you can feel kicks from the baby (fewer if it attached to the front)

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It is almost certainly much more dangerous. Any bleeding in zero G doesn't drain due to gravity so it just keeps pooling up in the same place. Not so much a problem for little cuts and bruises but anything more serious is going to be bad for the mother. Also being in zero G changes your blood pressure quite a lot and causes swelling in different parts of the body so there could be complications to the mother from that and if the fetus was grown in zero G and not just birthed there it is 100% gonna have issues because of that but we don't know what they are.

You could guess at all kinds of things that would probably be not great too but I guess we don't really know til we try, at the very least you would want a team of doctors present.