Gravity has a huge impact. Women carrying babies in a breech or transverse lie are often advised to go swimming as the weightlessness can often stimulate baby to finally move into a position more conductive to vaginal delivery.
According to my husband, who is in the nuclear industry and carried out a WANO inspection of a different Japanese nuke plant in December, the silvery square topped slots are the ones holding spent fuel assemblies. (Seen in upper left and upper right of photo.)
That poster is only a representation of one of the more common lies in a term pregnancy.
Pre-term they can be almost any position at all, but at term, space dictates they bring themselves into one of 18 lies with left occipitoanterior (your poster) and right occipitoanterior being most...