06/06/2026
🐔🥚 How Internal Fertilization Works in Chickens (Hour-by-Hour Timeline)
🐓 0 Hour – Mating (Rooster + Hen)
The rooster transfers s***m into the hen through the cloaca (“cloacal kiss”).
No pe*******on like mammals.
S***m enters the hen’s reproductive tract.
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🕐 1–2 Hours After Mating
S***m travels upward through the hen’s oviduct.
Strong s***m reach the s***m storage tubules near the top of the oviduct.
Weak s***m die.
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🕒 2–24 Hours After Mating
S***m can now wait inside the hen.
The hen stores live s***m and releases small amounts when she ovulates.
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🥚 Ovulation Time (Fertilization Moment)
The o***y releases the yolk (egg cell).
Fertilization happens in the infundibulum (first part of oviduct).
⏱️ Important:
The egg can only be fertilized around 15–30 minutes after ovulation.
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🕕 After Fertilization – Egg Formation (~24–26 Hours)
First 15 minutes
🥚 Fertilization occurs
3–4 hours
🥚 Egg white (albumen) is added
1–2 hours
🥚 Shell membranes form
18–20 hours
🥚 Hard eggshell develops
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🐣 24–26 Hours Later
The hen lays the egg.
