I'd just tell them the truth. Thats what I did with Paris, she's watched birthing shows on foxtel and she understands that theres a special "door" ie the cervix which opens up when in labour and the baby has to squeeze through and comes out the mothers vagina. And we went through it all, she also understands what it means to have a c/s and that her birth was via c/s because the door didn't "open" enough for her to come out so the Dr made a little door specially for her then sewed it up again!

The thing about children is that they can understand alot more than most people give them credit for. Paris was able to understand the concept of amniotic fluid and what its purpose was, same for the umbilical cord, why I bled after Seth's birth, what the contractions were doing and she even tells me "Mummy you can't feed seth your milk because you have had wine so you better get daddy to give him a bottle." I explain EVERYTHING to Paris we have a great understanding, "Why?" is a great question it allows us the chance to bond with our kids, if they keep asking "Why?" generally its because the answer we gave hasn't satisfied their thirst for knowledge or curiosity... except for that 5% of the time when its to see how much they can get under our skin Its not really about what you tell them as it is how, and they only fear what they don't understand. You would think post birth bleeding would be scary to a 4 y.o. but Paris understood that it was my's body's way of cleaning out my tummy of seth's house. Because Seth wasn't in my tummy any more as I didn't need the house in my tummy so it all had to come out. And it didn't hurt.

*hugs*
Cailin