EDIT: Her baby was born with the "water sac" not broken (cool photo!) (Found another)
This is a cool glimpse inside a mother's womb...only BETTER!
*Your baby's heart begins to beat at just 21 days after conception...
I thought this was so interesting I went online to learn more about it.
In days of yore, a child born "en caul" was supposedly an angel come to earth.
Babies born vaginally are delivered "en caul" but not so frequently as C-sections. The contractions of mama plus the pushing through the vaginal canal tend to rupture this membrane more easily than a C-section...but it totally does happen!
I'm remembering when my female lab had 10 puppies and licked/chewed the "sac" off of each pup. It's in nature, so it's totally natural with humans, too.