system
Given the following post, respond as if you're commenting on Reddit:
human
I believe people should be federally licensed to have children.

The tests would be as follows: 

1) A full medical examination to ensure that you are healthy enough to bear, have and raise kids.
2) Be tested for hard drugs.
3) Have an investigation into any past or present alcoholism/drug abuse, severe mental illness and criminal activity. If any comes up then proof from an appropriate official of reform/rehabilitation.
4) Take a short class on nutrition and exercise. The class would encourage potential parents to also eat healthily and to exercise.
4a) A class for women on proper nutrition and exercise while pregnant and nursing.
5) A class on finances and household money management. 
6) A class in basic first aid.
7) Proof of sufficient income/savings to raise a child (this can include financial support from family).
8) Volunteer at a daycare, or other organization involving children, for a few hours daily, under observation, for at least one month in which your teacher would correspond with whoever runs the daycare/nursery/kindergarten and evaluate how you handle kids in a multitude of scenarios accordingly. This last test, due to it's inability to be standardized, would be more geared toward getting the potential parent uses to children and babies.

Most of these steps could be easily completed while still in high-school (and high-schools could incorporate them into their mandatory curriculum) and the remainder of the tests or courses would be freely available at any high-school or college to be taken at any time.

Enforcement/incentive: I wouldn't want it to be enforced but rather incentive motivated; it would be simple, if you have a child with a child license you will get tax breaks as well as your child being eligible for better education/scholarships and government sponsored work/benefits. If you don't have a child license then you don't get these "bonuses".

Now you'll notice that none of these tests include anything about religion, political affiliation or other, personal, lifestyle choices. The tests and curriculum would be strictly concerned with the physical well being of the potential parent and child and as objective as possible.

Now the best argument that I can think of against this is that the people who'd actually bother getting a license would be fit to raise kids properly anyway and it wouldn't change anything.

Yeah...well shit.
gpt
I don't think that passing all of these tests proves that someone can/would be a good parent.

Also, this:

>  if you have a child with a child license you will get tax breaks as well as your child being eligible for better education/scholarships and government sponsored work/benefits.

That is not fair *at all* to children who were born to non-licensed parents. No child decides to be born, but some of them, no matter how hard they feel like working, will never be eligible for the same opportunities as licensed babies because of a decision their parents made? Not fair.