Day 7 candelling red blob question

[LibyLooLa]

I had a look at the eggs with light on day 4&5, the lady i got the eggs from was curious incase we needed more. I have some with clear developing embryos. Today is day 7 and a few i was unclear about are now showing development. This little one however just has a red blob, no blood ring or veins, has it just stopped developing or its just started to? This is my first time hatching eggs

 

[nuthatched]

Is your incubator calibrated?

 

[LibyLooLa]

Is your incubator calibrated?

Yeah its set to 37°c, i also have an ink bird set up

 

[nuthatched]

Yeah its set to 37°c, i also have an ink bird set up

It could just be a late bloomer, I'd keep the egg there for a few days.