I agree with the above, there is so much misinformation about autism online. As far as I am aware there's no evidence that IVF is linked to a higher chance of autism. You can do your own research (from trusted sources please) into the causes of autism. It is genetic so tends to run in families. Its quite common currently for one family member or child to get diagnosed which then leads to parents or other family members then recognising autism in themselves. Perhaps they weren't aware of autism until their child was diagnosed as it wasn't always recognised in previous generations, especially in women.
“Strong sperm” e.g. the one that got to the egg first won’t affect which specific chromosomes are carried by the sperm - that’s completely random. There are probably more babies born via IVF now than ever before as the science has improved. There are more children diagnosed with SEN as we as a society have become better at recognising it. Correlation but not causation.
Autism / neurodiversity is genetic, it tends to run in families and this doesn't tend to be seen untill a child is diagnosed. I haven't seen any peer reviewed articles which say there is a link but there is lots of misinformation out there about autism and it's causes so always be mindful of what you are reading.