Hey guys. It's been almost 3 weeks since Sabrina (the big female) laid her eggs. She laid two, and I noticed that one has chalked up nicely, while the other hasn't quite as much (but I believe it has a little). The one that has chalked has some definate veins visible when candling. The other one doesn't (is it likely that one egg could be fertile and the other not?). I'm also trying to figure out how to tell if there's too little/too much humidity in my incubator, which is currently a standard hovabator set to approximately 87f (give or take a degree).

So this is mostly to those that have hatched eggs, preferably russians, but really any data is helpful. this is something I admittedly know next to nothing about. One thing I have noticed is that the smaller end of the oblong shape of the egg seems to be pointing out ever so slightly (kind of looks like a nipple to be honest). What could this indicate?

Thanks in advance. it's been such a weird experience. I never expected to buy a gravid reptile.