Clearing the Air: Myths and Facts about IVF and ET

Understanding IVF and ET: The Basics

In Vitro Fertilization (IVF) and Embryo Transfer (ET) are two of the most powerful tools in modern livestock breeding. Both are designed to multiply the genetics of elite females—but they work in different ways.

• Embryo Transfer (ET) involves hormone treatments to stimulate multiple ovulations, followed by collection of embryos directly from the donor cow.
• In Vitro Fertilization (IVF) is more lab-based: eggs are harvested from the donor, fertilized in a controlled environment, and the embryos are later transferred into recipient cows.

These technologies help breeders accelerate genetic progress, but they’ve also picked up a few myths along the way. Let’s break them down.

Myth 1: IVF and ET Require Excessive Time and Labor

The Truth: IVF can actually reduce handling and time commitments.

Compared to traditional flushing, which may require a cow to be handled 12–14 times per cycle, IVF protocols can bring that number down to just 1–6 times—depending on the approach used. That means less labor, less stress on animals, and more streamlined workflows for your team.

Myth 2: Genetic Gains Take Too Long to See

The Truth: Genetic improvement does take time—but it’s worth the wait.

It typically takes around five years to fully realize the genetic progress from IVF or ET. That’s because offspring need time to grow, perform, and re-enter your breeding program. But the ability to replicate top-tier genetics across your herd accelerates the pace of progress in a way traditional methods can’t match.

Myth 3: IVF Increases the Risk of Large Birth Weights

The Truth: While this used to be a larger issue, today’s protocols and new research changed the game.

While high birth weights were more common in IVF calves years ago, they’ve become rare thanks to refined protocols and better management. Data from Trans Ova shows that only 1–3% of IVF calves are considered oversized today, compared to 5–30% a decade ago.

Yes, factors like nutrition and season can still play a role, but they’re manageable—and Trans Ova can help you plan for them.

Myth 4: IVF Is Too Expensive to Be Worth It

The Truth: IVF can actually offer a better return on investment.

IVF tends to produce more embryos per collection with an average of 8.5 for beef donors and 5 for dairy donors. And with options like sexed semen, you can be even more strategic about the offspring you produce.

Combine the reduced handling requirements with the ability to maximize your herd’s top genetics, and IVF isn’t just viable—it’s a strategic advantage.

How Trans Ova Helps You Succeed

With decades of experience and an unmatched expertise across breeds and protocols, Trans Ova Genetics helps breeders make confident, informed decisions. Whether you’re running a boutique program or a large commercial operation, our team can design a reproductive strategy tailored to your goals.

Final Takeaway

IVF and ET aren’t just for high-tech breeders—they’re practical, proven tools for anyone serious about improving herd genetics. Understanding what these technologies really involve helps you can make better decisions for your operation.

And with the expertise of Trans Ova by your side, success isn’t just possible—it’s predictable.