yellow spots on eggs?

[Matt]

I have a clutch of corn eggs that were laid only about 2 weeks. They all look good except a couple of them have yellowish spots on the very ends of the eggs.

They yellow spots are not harder to the touch, but it looks a little odd, because all the eggs are so perfectly white, yet a couple of them have concerning yellow spots.

anyone have this problem or know if its any need for concern.
the reason i ask, is because i saw the same thing in a clutch of w. hognose 2 years back and ending up losing a couple from that clutch!

thanks