Well, we got it. From Alexander. The question.
"But when you decide that you want one, where do you get a baby?"
Alexander is six years old, just finished kindergarten and will enter first grade at a new school next year. He would not be satisfied with, "the baby grows in mommy's belly, in her uterus."
"But how does the baby get there?"
For a moment, I freaked out. Had no idea what to say. I have a tendency to over-explain which makes kids (and my husband) zone out after a few minutes. I almost said, "Ask your father." But I stopped myself. I could do this. Just keep it simple.
So I told about a sperm from Papa and an egg from Mama getting together to form an embryo which grows into a fetus which grows into a baby in Mama's belly/uterus.
I bit my tongue to keep from explaining 'embryo' or 'fetus.' No way was I going to try 'sperm.' I waited for questions.
But Alexander just nodded, thoughtful for a moment, then went back to his book where fish were laying their eggs.
And that was that. The Question. Answered!
At least for now.