@rufita
Above I posted photos with comparison of an egg with a round worm and an egg with a chalazae stretched over the yolk.
Look next to that egg, and you see an egg with thin, watery yolk.
Below are links to an egg similar to yours with explanation of causes.
If she seems healthy, no signs of sneezy, coughing, ruffled feathers, she may need better nutritional support or investigation into what may be causing her stress.
If she has even the slightest sneezing, lethargy, oddness, it could be Infectious Bronchitis...sort of like a chicken cold...that can throw the eggs off color. IB in younger chicks is more devastating and can cause death. IB in older pullets and adult hens often is only seen in poor egg production and quality in mild strains while stronger strains will cause racking coughs and rails.
IB is usually not fatal but will throw them off their laying and overall energy for several weeks. Return to egg laying may take a number of weeks after the virus has run its course. Since it is a virus, only general immune support helps (such as garlic in mash, ACV in the water, I've even added Elderberry tincture which seemed to help).
IB
http://agritech.tnau.ac.in/expert_s...trol And Management.html#infectiousbronchitis
Causes of egg malformation
http://www.thepoultrysite.com/publications/1/egg-quality-handbook/18/misshapen-eggs/
Hopefully this is a short transitional phase in a younger pullet. Better nutritional support and making sure there is less stress in the flock usually helps.
If IB, time and TLC.
LofMc