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human
CMV: If a couple is infertile on just one side, then it’s a better idea to adopt rather than get a donor

Explaining the title a little bit, I mean that if in a cohabitating couple situation where you’re actively wanting kids but one person is infertile while the other is fertile, it is typically a better idea to adopt your child rather than get a sperm or egg donor.  My reasoning is as follows:

If, as a couple, you agree to get a donor, one part of the couple doesn’t have any biological connection to the child. If the consensus is that it shouldn’t matter, and that the infertile person should love the child the same as if it were their own biological child ( a sentiment I agree with), then there’s an understanding in the couple that biological ties are not paramount in a parent-child relationship. Given this, it seems then that the other party ( the fertile one) should also be fine with not having biological ties to the child. And, in my experience, by having the child adopted you avoid some of the sticky pitfalls that can come with a donor situation. 

Anecdotally, I have heard of situations where one parent feels less obligated to be involved in the raising of the child because they’re not related. On the other hand, I’ve also heard of situations where the party that was fertile and is biologically related to the child gets a complex and believes they have more of a say in how the child is raised since it’s their flesh and blood. In a situation where the couple separates, it also makes things more complicated and unfairly weighted towards the person who is biologically related. 

Personally, I’ve also seen situations where one half of the extended family treats the child noticeable different than the other and that can also be damaging for a young child to experience. With an adopted child, while there are certainly difficulties that a couple needs to be cognizant of, it just seems like there’s fewer ways for a weird dynamic to emerge and affect the child

Sorry for the formatting, I’m on mobile!
gpt
A sperm/egg donor can be ethically obtained pretty quickly/easily, and is likely to be healthy.

Adoption for healthy infants takes many years of heartbreaking waiting on a list, and many agencies are pretty unethical.  Like at the heart of it, you so often have a woman who can't afford to take care of her child but would like to, and the goal is to get a couple willing to pay to raise the child but only if the mother is out of the picture not if they are helping her 

Obviously if you are okay with an older child or a very sick infant different story.  But if you just want a baby, getting a sperm or egg donor is so much easier and faster.