Demonstrates the lack of thought...
Zika has been demonstrated to remain in sperm (and be sexually transmitted) for several weeks after infection. If transmitted to a female partner who becomes pregnant, there is a high risk of microcephaly (or any of the other neuronastiness that Zika seems to cause).
Unless they're planning to get pregnant in the 8 weeks or so post Games it seems bizarre. Doubtless a company is happy to take their money.
Finally I'd point out that Greg's little swimmers are likely to be somewhat inadequate at this time, as the level of training involved to get to Olympic standard is such that fertility is impaired. (I would add for many athletes the "nutritional supplements" aka PEDs are also probably an issue; I don't think this is likely with him.)