14/12/2025
📣 WHY SOME FERTILIZED EGGS FAIL TO HATCH — AND HOW TO PREVENT IT
Many farmers lose chicks in the incubator without knowing the real cause. Hatchability is not just about the incubator; it starts with parent stock, egg handling, and correct incubation management. Here are the key factors every serious farmer should understand 👇
🥚 1. Infertile Eggs (No Development at All)
Even before incubation, some eggs are simply not fertile. Common reasons include:
- Weak, old, or sick roosters
- Too many hens per rooster or vice versa (ideal ratio: 1:8–10)
- Heat stress or poor nutrition in breeders
- Inbreeding or poor flock genetics
Tip: Candle eggs. Clear eggs = infertility
🥚 2. Early Embryo Death (Days 1–10)
This is the most common cause of hatch failure.
- Incorrect temperature (too high or too low)
- High humidity in the first 18 days
- Dirty eggs = bacteria entering through pores
- Failure to turn eggs regularly
- Weak parent stock due to poor feeding or disease
What you’ll see: Blood rings, no veins, or a small embryo with no movement.
🥚 3. Late Embryo Death (Fully Formed but Didn’t Hatch)
Painful losses because the chick was almost ready.
- Low humidity during lockdown = shrink/wrapping
- Excess humidity = chicks drown in unabsorbed fluid
- Poor ventilation = low oxygen
- Temperature fluctuations in the last week
- Weak chicks from malnourished parent stock
What you’ll see: Fully formed chick dead in shell, internal pip only, or external pip with no progress.
🔍 How to Diagnose Hatch Failure
Professional hatcheries always check unhatched eggs. You should too.
- Day 23: check unhatched eggs to identify the exact stage of death
This simple routine can improve your hatch rate dramatically.
💡 Key Takeaway
Strong breeders + clean eggs + correct temperature + correct humidity + proper turning = high hatch rate and healthy chicks.
