How do the women of Amazon Lily reproduce? I just got to the part where Luffy arrived to Amazon Lily.

I started wondering, how do the women multiply in Amazon Lily as there are no men?
There were kids, so they must've some method.



Maybe you could explain?
Some of the resident leave Amazon Lily and sometimes, they come back pregnant.


They didn't bring their husband, because it's forbidden for men to enter Amazon Lily, but they still keep the baby and raise them inside the island. However, they always give birth to females. There's still no answer, but from a question about why all Kuja tribe born as a woman?  and also from the picture above, it just happens mysteriously.