How to Turn Eggs in Incubator | The Right Way for Hatching

Turning eggs in an incubator keeps embryos from sticking to the shell membrane, and it usually stops around day 18 of a chicken egg’s 21-day hatch.

Getting the turn right is one of the most important parts of hatching chicks at home. Eggs left sitting still too long let the embryo drift against the shell’s inner membrane, where it can stick and die. The process is simple: turn eggs at least three times a day, keep them on their side, and stop turning during the final lockdown period before hatch.

How Often Should You Turn Incubator Eggs?

Most hatchery guidance recommends turning eggs at least three times per day, with five times often preferred. Some commercial hatcheries turn eggs hourly. The more often you turn, the closer you mimic a broody hen shuffling her eggs naturally.

Consistency matters more than raw frequency. If turning three times a day, aim for every eight hours; for five turns, spread them across waking hours. Each turn takes seconds, so the challenge is remembering. Automatic turners remove the guesswork, with built-in units cycling roughly every 90 minutes. The best automatic egg turners for home incubators handle this task alone, helping anyone who works long hours or travels.

What Is the Correct Technique for Turning Eggs?

The most common mistake is spinning the egg end-over-end. Rock it gently side-to-side instead, keeping the egg on its side—like a see-saw, not a log. The other key rule is alternating direction: if you turn clockwise, next time go counterclockwise. This prevents straining delicate blood vessels around the embryo.

Here’s the simple workflow most backyard hatchers use:

• Mark each egg with a pencil—X on one side, O on the other—to verify every egg gets turned.
• Wash hands or wear clean gloves before touching eggs to reduce contamination.
• Rock each egg side-to-side to the opposite mark, then place it back on its side.
• Alternate direction with every session.

This guidance is for chicken eggs. Quail or duck eggs run on different schedules and incubation lengths, so check species-specific guidance first.

When Do You Stop Turning Eggs in an Incubator?

Turning stops during “lockdown,” the final days before hatch. For chicken eggs, this is day 18 or 19 of the 21-day incubation. The chick has positioned itself to pip through the air cell and no longer needs turning. Continuing after lockdown can dislodge the chick from its correct hatching position. During lockdown you also increase humidity and stop opening the incubator to prevent drying out.

Your incubator’s manual is the final authority. Some automatic turners have a lockdown program that stops turning for you; engage it when you remove the turner tray and set eggs on the hatching surface.

What Happens If You Turn Eggs Wrong?

Turning too infrequently during the first 18 days, or stopping early, increases the chance the embryo sticks to the shell membrane and dies. Turning in the same direction every time strains blood vessels; spinning instead of rocking can damage the embryo directly. A clear egg when candled usually means early embryo death from improper handling or temperature. A chick that pips but fails to zip often signals humidity or positioning issues during lockdown.

Brinsea, an incubator manufacturer, notes turning prevents embryo sticking, aligning with poultry-industry consensus on rocking motion and stopping before hatch. Purina’s 21-day guide and Texas A&M AgriLife Extension’s incubation handbook cover the same schedule and technique in detail. A complete 21-day hatching guide from Purina is a solid reference for first-timers.

The bottom line: turn eggs at least three times daily, rock side-to-side, alternate direction, and stop on day 18 or 19. The first 18 days reward diligence—the last three reward patience.

FAQs

Do I need to turn eggs on day 18?

No. Day 18 is typically lockdown for chicken eggs, when turning stops and the incubator stays closed until hatch. If your model has a removable turner tray, remove it on day 18 and set eggs on the hatching surface.

Can I open the incubator to turn eggs?

Yes, briefly during the turning period, but keep it short to avoid temperature and humidity swings. Once lockdown begins on day 18, avoid opening entirely so chicks don’t dry out.

Is it okay to turn eggs with bare hands?

Yes, if clean. Wash with soap and water or wear disposable gloves. Oils and bacteria can transfer through the porous shell, so hygiene matters, though eggs aren’t fragile enough to break from gentle handling.