What is the standard body weight curve for brown layer pullets from week 1 to week 18?

Rearing the perfect pullet is the foundation of a highly profitable laying cycle. Breeding companies (like Lohmann or Hy-Line) provide precise body weight growth curves that farmers must monitor weekly by weighing a representative sample of birds (at least 100). The growth phases are strictly defined: the starter phase (weeks 1 to 5) focuses on immune system and frame development; the grower phase (weeks 6 to 12) builds the digestive capacity; and the developer/pre-lay phase (weeks 13 to 18) builds the reproductive organs and medullary bone reserves. If pullets are underweight at week 18, light stimulation must be delayed, otherwise, hens will lay small eggs and suffer from high prolapse mortality. Farmers can access weight-chart software in the Poultry Encyclopedia, buy premium grower feeds on Poultry Plaza, check raw feed rates on Poultry Rates, and trade on Murghi Mandi.