Follicular growth and atresia in the ovaries of hens (Gallus domesticus) with diminished egg production rates

摘要

Summary. Diets containing 3路5, 1路0 and 0路1% calcium were fed from the age of 42 weeks to individually caged laying hens. Ovaries were examined at 46鈥?9 and 70 weeks of age for changes in the follicular population corresponding to the lowered egg production rates of birds given calcium-deficient diets (1路0% and 0路1%) and older birds given a normal diet (3路5%).