“Irrelevant. With natural sex you aren’t in control of or responsible for the process of implantation. Your responsibility starts when you are successful.”
If both processes cause the death of fertilized eggs then it is only a matter of numbers.
Perhaps in the future IVF will result in fewer lost fertilizations than natural sex.
Not in the least. Thirty people killed by a cancer is not morally equivalent to thirty people killed by medical malpractice.