The legalization of any procedure or product has to be weighed against both the good it does and the harm it does. I believe another problem with artificial insemination is that extra embryos are created that become frozen or destroyed. This is where the aspect of the cheapening of human life comes into the discussion. Adoption is still a great option that not only helps the parents but an existing unwanted child.
Maybe they decided to use only two eggs, and they were both fertilized.
“There are no unwanted children, just un-found families”- National Adoption Foundation
Embryos can also be donated to couples who desire children.