True. Problem is, I would consider the question still valid on the basis that not every embryo successfully implants.
IVF can up the odds of success by using multiple embryos at the same time in the hopes that at least one of them will work, which is why people who go for IVF sometimes end up having quadruplets and such.
So every time one or more IVF attempts fail, what, they have to inform the government their 7th child in a row has died? Every post-coital period, do I hedge my bets?