Again, the science of DNA (life?) continues to admit, in additional ways, that “the gene” alone is not the master of its own fate.
The DNA of the infertile parents are somewhat off the norm in the first place. IVF merely enforces reproduction, usually over-riding the obstacles that occur in its achievement, without artificial aid.
That said, it is accepted knowledge that genes can be affected by behaviour:
The quality of the sample (is it unbiased?) is much more important than the size.