https://www.ncsea.org/wp-content/uploads/2022/04/Quick-Facts...

In the US, there is ~$115 billion worth of child support debt outstanding. Even with DNA testing, we’re not going after the folks who aren’t supporting their offspring, mostly because they are low income and have nothing to take to satisfy these debts.

https://www.aecf.org/blog/child-support-statistics

> Yet, 2020–2022 data in the KIDS COUNT® Data Cen­ter reveal that just 23% of U.S. female-head­ed fam­i­lies report­ed receiv­ing any amount of child support dur­ing the pre­vi­ous year (down from 26% in 2018–2020). Female-head­ed fam­i­lies refer to unmar­ried women liv­ing with one or more of their own chil­dren under age 18, which may include stepchil­dren and adopt­ed children.

> One in three kids — near­ly 24 mil­lion kids total — lives with a sin­gle par­ent, most­ly sin­gle moms. In fact, accord­ing to 2022 Cen­sus Bureau data, of the 10.9 mil­lion one-par­ent fam­i­lies with chil­dren under age 18, 80% were head­ed by a moth­er. This makes women the more fre­quent cus­to­di­al par­ent and the major­i­ty of those who need child support.

While fertility rates are down, roughly 40% of annual pregnancies in the US are unintended (per the Guttmacher Institute). There is still much work to do to drive down the rate of unwanted pregnancies.