Are there any studies on the fertility levels of humans/mammals as a function of their stay at Antarctica?
I haven't been able to find a study on fertility, but it would be important to note the difference between radiation considered.  The dangerous radiation discussed in both of your links are cosmic rays as you noted.  Our main defense against this sort of radiation is the earth's magnetic field.  The hole you are talking about is in the ozone layer, which is much more important in UV protection than cosmic ray protection.  The amount of incident cosmic rays is slightly more at latitudinal extremes due to the deflection away from the equator by the magnetic field, but this is only 1.5 to 2 times greater, see fig. 8.

Unless we figure out how to punch a hole in the magnetic field as well, the main threat in the arctic is skin cancer from UV, not infertility from cosmic rays.