@Aviz @Aether >experiment it on the ISS, which has no gravity at all
The ISS has plenty of gravity, it's just falling so fast it keeps missing the ground.

It's called microgravity.

A baby may possibly form with defects under lower than 1G gravity, but under microgravity it will just be aborted (experiments with rats, or was it insects detailed that for anything to hatch/be born required 1G gravity for at least the initial development stages).