What do you mean by "health and incest" if you don't mind? I haven't heard of that about donor conceiving industry
the sperm / egg donation, even IVF industry is rather unrestrained in majority of the world where its allowed. it of course used to be worse back in the day with many more couples being lied about the course of treatment & genetic material & some being promised to use their own material but that not happening due to either malice or lack of hygiene etc etc... Which often involved doctors just using their own sperm without the woman's consent. You can also guess the similar cases with male doctors doing this in modern age to lesbian couples without their consent out of sexualization.
But in many ways it hasnt gotten better since. Even contracts are often not followed, such as the expiration date of the genetic material. Its not uncommon for someone to donate, say, 25 years ago, and the clinic promises to stop using it after 5 years both for the donors consent & health worries due to bio degration, but ofc. LoL. Children conceived after the contract was expired for 20 years are also not unheard of.
One of the biggest worries is the lack of coordination among clinics which is where the incest part comes in. For a majority of the industry history, there was no limit on How many children could be conceived out of 1 donor, 1 donor could donate to several different clinics and the clinics could use the material over and over and over, which meant hundreds or dozens of people going around not knowing they are half siblings, especially in the same City & region, and thats just one donor. and you can guess the dating concerns this rises for donor conceived people, a complaint i have seen often reading their experiences, the worry of always having to get genetic tested with a partner Just in case and the worry that it will turn out they have been your sibling all along, which is also not unheard of.
Even for modern practices supposedly preventing this, clinics simply do not work together. The tightest regulations tend to be "5 families per donor", and "5 or under" are only for around 4 countries or so! For majority with regulations it is 10 to 25 families (again, not children, *families*, children limits also tend to be stuff like "70 kids per donor), and in some it is completely unrestricted, such as the United States. The only state with restrictions, it is 25 families. And again, thats often just one clinic, majority of the cases there are no restrictions checking if the donor was also at another clinic, so it can be 25 families at one clinic, 25 at another etc etc..
This uncontrolled state brings another problem, which is Health history. There are open and closed ones, but in many cases, donor conceived people simply do not have access to at least half of their medical history, accomodating for those who were donor conceived both ways. If they were to want to personally ask the donor, since contracts are often closed, they simply cannot. It also can be that the donor doesn't want to therefore the donor conceived person simply do not have access to their info, but also often the family did not want to and made this decision for their child, and many people actually aren't even told when they are donor conceived. Due to similar reasons and situations, if the donor were to later get an illness in life, especially one that's genetic, it is often the case that they cannot tell them. Even if they could, they actually dont have to. So theres also the worry donor conceived people face of this worry, not having access to medical history. But besides all that, due to the importance society places on genetics and the raising parent whose material was used being considered the "Real parent" etc, it does end up in a unique struggle for donor conceived people, who also often have the baggage of being raised by same sex couples in a homophobic world
For the donors themselves, since donors often get paid, you can probably guess the ethical concerns of people having to donate sperm / eggs due to poverty. Especially for egg donation which is more taxing on health to do, it is often not a pleasant thing to do under the gunpoint of financial worries. And that's for couples where at least one has a uterus, as for those that don't, the deeper can of worms enters: Surrogates. Especially with surrogates often being even poorer women, especially from the third world, and pregnancy's unique dangers on the body, it is criticized more. Etc etc and other problems of fertility industries..