science

In ovo

In ovo is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand In ovo rather than just read about it. In short: In ovo is Latin for in the egg. In medical usage it refers to the growth of live virus in chicken egg embryos for vaccine development for human use, as well as an effective method for vaccination of poultry against various Avian influenza and coronaviruses.

Key takeaways

In ovo belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect In ovo to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of In ovo from memory before moving on to harder problems.

Reference excerpt

In ovo is Latin for in the egg. In medical usage it refers to the growth of live virus in chicken egg embryos for vaccine development for human use, as well as an effective method for vaccination of poultry against various Avian influenza and coronaviruses. During the incubation period, the virus replicates in the cells that make up the chorioallantoic membrane.

Advantages In human vaccine development, the main advantage is rapid propagation, and high yield, of viruses for vaccine production. This method is most commonly used for growth of influenza virus, both attenuated vaccine and inactivated vaccine forms. It is recommended by the World Health Organization in managing influenza pandemics because it is high-yield and cost effective. In poultry, In ovo vaccination improves hatchability and efficient protection against Avian influenza (AI), Newcastle disease (ND) and Coronaviruses (Av-CoV). Seroconversion rates of chickens vaccinated as embryos ranged from 27% to 100% with ND vaccination and 85% to 100% for AI vaccination. The birds are protected before delivery to a commercial operation such as a farm, thus preventing the spread of Avian viruses.

In Ovo Vaccination In ovo vaccination is carried out by machines. These machines perform a number of actions to ensure good vaccination of the chick inside the egg. Benefits of in ovo vaccination include avoidance of bird stress, controlled hygienic conditions, and earlier immunity with less interference from maternal antibodies. This practice has been used in the broiler chicken industry, but recent adoption of in-ovo sexing technology in the layer industry has also made it possible for layer hens.

Feeding

In ovo feeding is a considered as a potential tool to provide nutrient to embryo as well as to modulate performance and gut health of pre and post hatched chicks. Based on the purpose the in ovo injection could be considered as in ovo stimulation or in ovo feeding.

See also In-ovo sexing Vaccine Polio vaccine List of vaccine ingredients List of vaccine topics Virosome

References

Illustrations

Worked examples

Example 1 — a first encounter with In ovo

Start with the simplest possible case. Write down what In ovo claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to In ovo before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about In ovo ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of In ovo

In research: In ovo appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses In ovo in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: In ovo is common in secondary-school and first-year university syllabi. It links to neighbouring topics Vaccination, so understanding it makes those chapters shorter.
In everyday life: Look for In ovo outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “In ovo” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study In ovo in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what In ovo means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain In ovo out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is In ovo in simple terms?

Why does In ovo matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study In ovo?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on In ovo.