@GCS34 from what they saw on scans when I first started looking into my fertility stuff there was nothing known that would stop me getting pregnant naturally, I had 2 polyps removed a year ago but had been having unprotective sex when I was in my 20s in stable relationships thinking if I had a baby then it would be fine but not actively trying so no idea really, I have a shortish luteal phase so thought that could be it. The good thing about IVF Vs IUI is that IVF gives more info on egg quality (not all of it), so some people have failed fertilisation and if that had happened for me with a donor it would have suggested it was an egg quality issue.
Guna reply to the egg sharing thing too if that's okay because I looked into it as just a couple of years under age limit. I had an AMH report at the beginning of the year that said my AMH was 21 and with my current clinic you need it to be 20, when they tested it was only 16 so they wouldn't let me do egg sharing. My thinking was it would give a higher dose of meds and more eggs but they reassured me it's the same meds.
If someone opted to do it and you got 8 or more eggs they are split equal, and if there's a odd number you get to keep the extra one. If you got less than 8 you would have to pay the rest of the package fees to make it up to a normal mild cycle. I got 7 in the end, but does make me think with the drop off that which low numbers such as 8/10 and then giving away half before you even start the fertilisation process it could be chancey you end up with nothing.
Also as a donor you can checks register to see if a baby was born from those eggs, if I hadn't of had a baby and found out some were born from my eggs I feel that would be heartbreaking so was kinda happy the decision was taken out of my hands due to the reduced AMH.
Re the private donor stuff, let's say a gay friend, their sample would have to be checked and stored for a period of time and some legal agreement has to be written up to state what rights they have and don't have, same as in you can't claim maintenance from them.
Re the dodgy FB groups, oh my word it worries me but I can absolutely understand the desperation people must feel. Basically a man turns up to a person's house in his van, produces a fresh sample and then the woman/partner of woman places it inside with a kit bought offline... So a very cheap version of an IUI.
My personal feelings (mini rant sorry) on it are that it's wrong on so many levels, a child conceived that way could end up in a relationship with a blood relative, also explaining to a child, as the truth always comes out, you don't know that donors medical history and it lets anyone access it, sometimes on a whim too. I get that is harsh but for my first clinic I had to have all my GP medical records and family history available to my clinic to check I would be a suitable parent, they can decline people.
I've had a male friend offer to be a donor for me in the past and shamefully but being honest slept with a friend's with benefits when I wasn't on protection and around time of ovulation because of just feeling so desperate but even those are a whole other minefield. If a baby is conceive by intercourse then legally that guy is the father and has rights. You can't even write up a contract agreement when intercourse has happened.