I was 25 with first dd9 and 28 with dd6. Dd9 was identified this year in public school as a matter of policy. Dd6 has not been identified. We don't have the money to test and are still trying to make a life for ourselves as we didn't have support growing up. I think that grinity has a very good point that more children go unidentified with parent who had children at a younger age for many reasons.