Squatting has been used for childbirth since ancient times as it is the natural, instinctive way for women to birth their babies.
However, from Victorian times until the later part of the twentieth century, women in western countries were usually required to deliver their babies lying on their backs, a position which can make birth more difficult.
The story goes that Louis XV1 wanted to see the birth of his son and asked the obstetrician if he could place the queen (Marie Antoinette) on her back with her legs extended so as to facilitate this. The obstetrician realised that this position made things easier for him as well; he didn’t have to stoop down and look up at the women.
So this practise continued with most obstetricians then picking up on the practise. Victorian times it was also considered unnatural and immodest to deliver in any other way.