Because of limited data plan and unstable wifi in Taiwan, I first upload little video showing show a fetal head position change with maternal posture. This works only on our earth, but not in our universe outside earth.
首先用模型簡單解説胎位同母體姿勢関係。注意地球因為有地深吸到力，玩法同太空不一樣。
https://media.giphy.com/media/513lZvPf6khjIQFibF/giphy.gif