The Fertility Center of Las Vegas

Egg quality makes all the difference when it comes to IVF success

Both quality and quantity matter when it comes to eggs, but how does our Las Vegas fertility clinic assess egg quality? It can be easy to determine how many eggs resulted from an egg retrieval, but determining their quality takes a little more work.

Our embryologists work behind the scenes in our IVF laboratory to make sure that egg freezing and fertility treatments like IVF are a success. Grading egg quality is one of the ways that these dedicated professionals make this happen.

How do embryologists determine egg maturity?

After the egg retrieval procedure at our Las Vegas fertility clinic, the eggs go to our embryologists who prepare the eggs begin by clearing away the small cumulus cells that normally surround them. Once the team can get a clear look at the eggs, they can start grading them and determining how mature they are.

To assess egg quality, embryologists start by looking at the maturity of each egg. There are three different grades that an egg can receive.

  • Geminal vesicle (GV). This is an immature egg. Our team would not freeze or fertilize this egg for an IVF cycle.
  • Metaphase 1 (M1). This egg is still not mature. Sometimes, M1 eggs will mature after a couple of hours, but they may not be as high quality as eggs that were already mature.
  • Metaphase 2 (M2). This egg is mature and ready for fertilization. This is the best maturity grade an egg can receive.

How do embryologists determine egg quality?

Once our embryologists determine how mature each egg is, they will grade the egg quality as good, fair or poor.

  • Good. A good-quality egg has a normal shape and clear zona pellucida (the coating around the egg).
  • Fair. A fair-quality egg is misshapen, has a slightly pigmented zona pellucida and contains PV debris.
  • Poor. A poor-quality egg is misshapen, has a pigmented and thickened zona pellucida, and contains vacuoles and PV debris. Our team would not freeze or fertilize this egg.

Ensuring the best egg quality

Our Las Vegas fertility clinic prefers to only freeze or fertilize M2 eggs that have good or fair quality. To ensure that the eggs are healthy and likely to fertilize, our embryologists will reassess the maturity and quality of each egg before fertilization in the IVF lab.

If you have more questions about how we grade the quality of eggs, contact us to schedule an appointment. We provide an Oasis of Hope for women and men who want to preserve their fertility and grow their families.