Though the sisters had due dates just one day apart, they never imagined they'd give birth on the same day with the same midwife.
Researchers are now calling for a standardised method of assessing women’s feelings towards their changing bodies during pregnancy.
The 62-year-old yoga instructor is expecting to play a hands-on role in helping bring up the royal baby.
"I think this is outrageous - unfair on the mother; unfair on the father, who's being made to feel unimportant. He needs to bond too."