Maximizing Genetics: Bringing Donors in for IVF Services Up to 120 Days Bred

In the world of advanced reproductive technologies, in vitro fertilization (IVF) has revolutionized the way producers maximize their herd’s genetic potential. One of the most exciting advantages of modern IVF is the ability to collect oocytes from donor cows that are already pregnant—up to 120 days bred!

This game-changing capability allows cattle producers to continue advancing their genetics without sacrificing a valuable pregnancy.

How Does IVF Work in Pregnant Donors?

Traditionally, embryo collection was limited to open donors, meaning cows had to remain unbred for multiple cycles to continue producing embryos. However, thanks to advancements in OPU (Ovum Pick-Up) and IVF technology, we can now aspirate unfertilized eggs (oocytes) from pregnant donors and fertilize them in the lab without disrupting their existing pregnancy.

Here’s a breakdown of the process:

1. Ovum Pick-Up (OPU): We collect unfertilized oocytes from the donor cow using an ultrasound-guided aspiration technique. This process is safe for both the donor and the developing fetus.

2. In Vitro Fertilization: The oocytes are fertilized in the lab with semen from the bull of your choice.

3. Embryo Development & Transfer: The resulting embryos are grown in a controlled environment for seven days before being transferred into recipient cows or frozen for future use.

The key is timing—IVF can be safely performed up to 120 days into gestation, allowing producers to collect embryos while maintaining the donor’s pregnancy.

Why Utilize IVF in Pregnant Donors?

This approach offers multiple benefits that make it a strategic tool for progressive cattle breeders:

Maximize Genetic Output – Keep producing high-value embryos while maintaining the donor’s pregnancy. No need to choose between a calf and additional embryo production.

Better Use of Elite Genetics – If a donor is already confirmed pregnant but you want to continue utilizing her superior genetics, IVF allows you to do both.

More Flexibility in Breeding Programs – You can stagger embryo collection and natural pregnancies, making genetic progress more continuous.

Efficient Herd Management – No downtime for your top donors. Keep them bred while still producing future generations of elite calves.

Best Candidates for IVF While Pregnant

While many cows can undergo IVF up to 120 days bred, ideal donor candidates include:

1. High-value cows with elite genetics

2. Donors with a history of high embryo production

3. Cows that fit into a strategic breeding program where continued embryo production is essential

Considerations for IVF in Pregnant Donors

While the procedure is safe and widely used, here are a few things to keep in mind:

1. Timing Matters: The best window for IVF while bred is typically between 30-90 days of pregnancy. After 90 days, the fetus and uterus grow significantly, making OPU more challenging.

2. Consult with a Specialist: Work with a trusted reproductive specialist, like the team at SVS Repro, to ensure the process is safe for your donor.

3. Plan for Future Transfers: Decide whether you’ll transfer fresh embryos or freeze them for later use, based on your herd goals.

Ready to Take Advantage of IVF While Bred?

At SVS Repro, we specialize in helping cattle producers get the most out of their elite donors through IVF—whether they are open or up to 90 days bred. Our experienced team ensures safe, efficient, and effective embryo collection to maximize your genetic potential.

Contact us today to discuss how IVF can elevate your breeding program