500 is low compared to the overall brazilian population, but it is significant when you consider it is the wealthy brazilians ( a small portion of the brazilian population ) who are doing this. It's the wealthy elite who drive society so it is an interesting take on the elite's mindset and can shed a light on parts of brazilian society/character/ethos/etc.

In the hispanic and the greater spanish colonial world - "white is right" is a core ethic. It's how the spaniards ( with low numbers ) managed to rule so much of the native americans, asians, africans, etc for hundreds of years. It's interesting to know this also played a role in portuguese colonial world as well.

500 of anything is actually a lot for anything fertility related.

Consider that despite all the media attention surrounding women with careers freezing their eggs, statistically the percent of women who actually do this rounds down to 0%. In total less than 5,000 babies worldwide have been born this way, as compared with the 135M babies born each year.

Similarly, despite all the hype around banking cord blood, the actual number of families who do this is less than 1%. Most of those only do it because they got grants to do it for free due to some medical condition. And the number of times cord blood has actually been used to even attempt to treat some illness is less than 500 times total worldwide.