I have always answered my daughters questions...without offering much detail..ex..how did I get in your tummy...Your daddy put you there (asked about age 7) if she said ok and dropped it I did not elaborate....as she has gotten older she has wanted to know more detail...I answer with as much as she asks.
She is 11 now and "developing" so we have been talking a lot. My mother never did this with me...she depended on the sex ed videos. I got SO much misinformation from my peers it wasnt funny. I want my child to be informed so I will tell her anything she inquires about.
It is NOT up to me to let others educate her on this...it is my responsibility. And if she asks me something I do not know then she and I will look it up together. I want her to know that she can talk to me about ANY subject, including one as sensitive as this one, and get facts...so that when her friends tell her green m & m's make you horny she will not only know that that is BS but she will know what "horny" means (unlike me who was 15 before I knew, 3 years after I'd been hearing it day in and out in school)
oh...and I will not do what my mother did and call everyone in the family and within a 6 house radius and tell them that she started her period