I agree with Silverfox.
"I try to stay clear of saying "no children" as an outright statement because one never knows for sure"
Unless one knows first hand, that a person never had children or was never married, it should NEVER be so stated.
Many a child was given up for adoption or even just sent to live with an aunt.
I have a person that was found to have been "never" married, but records show that he fathered 8 children with 5 different unmarried females.