Correct me if I'm wrong, but that ropey white stuff isn't actually an indicator of fertility.
The actual indicator of fertility is the white spot on the yolk, as depicted in the thread found here:
https://www.backyardchickens.com/forum/viewtopic.php?id=16008
The ropey white stuff just holds the yolk in the center of the egg for stability.
The actual indicator of fertility is the white spot on the yolk, as depicted in the thread found here:
https://www.backyardchickens.com/forum/viewtopic.php?id=16008
The ropey white stuff just holds the yolk in the center of the egg for stability.