Was the focal point of the photo on the child’s genitalia or pubic area?
"It seemed to be."
"Was the child who is depicted in an unnatural pose, or in inappropriate attire, given the age of the child?"
"They were naked."
"Was the child nude or fully or partially clothed?"
"Completely nude your honor."
That's how quickly that can be used against you and I for one don't have that kind of faith in our legal system.
Look, it's your kid you do whatever you want, we could argue back and forth all day, I'm sure you're a decent parent and handle things as appropriately as possible but for anyone else reading this maybe give some consideration to pictures you take of your vulnerable kids and what purpose those pictures serve, some strategic bubbles or a cloth make the picture 100% innocent and it becomes a non-issue.