False Laying or internal laying in commercial layers

Variably depending upon stress, disease challenge laying hens start false laying (ova release in to abdominal cavity) ultimately ending up with mortality due to peritonitis. This problem is comparatively less in early weeks of laying but frequency increases with increase in the age of layers. Please share your experience/ knowledge for control of it.
Vaccination against diseases like IB, ND, MG, E. Coli is being done regularly.