"Embryo quality" is a misleading term By on July 19, 2012

Throughout Los Angeles and indeed across the world, the term “embryo quality” is used as a means of evaluating embryos in the IVF laboratory  .  Because the term includes the word “quality” it can be misleading for many patients. 

The word quality normally implies an inherent characteristic of something.  For example, most people think of a Rolls Royce as being a “quality” car.  The quality is inherent to the car whether it is new or old.  Embryo quality however does not have the same long term implications.  In fact, “embryo quality” is a short term description which is used to convey the chance that an embryo will implant.  It is important to realize that “embryo quality” has nothing to do with the health or wellbeing of the future offspring.  The term could be replaced by “implantation potential” as a more accurate description of the concept.

Embryo quality is derived by three types of observations in the IVF laboratory:

Laboratory Observations.

1.  Embryo Stage: There are standard stages which the embryo should reach each day after fertilization .  The first day after fertilization the embryo should be at      the 2PN (pronucular) stage.  The second day after fertilization the embryo should have 4 cells and the third day it should have 8 cells.  On day 4, the number of cells becomes difficult to count because they begin to “melt” together.  This is called the morula stage.  Lastly, on day 5 a cavity forms on the inside of the embryo and this is called the blastocyst stage.  Top quality embryos reach each stage on-time, lower quality embryos take more time.

2.   Irregularity: ideally, the cells within an embryo are smooth round and even.  A high quality embryo has few  to none irregular cells

3.   Fragmentation: little bits of debris which are visible within the embryo are called fragmentation.  Like irregularity, the least amount of fragmentation, the better.

We consider all these factors when determining embryo quality and together they give us a good sense of implantation potential.  Remember though, that it is not a perfect system.  There are plenty of instances where poor quality embryos go on to become perfect wonderful babies.  Unfortunately, there are also instances where top quality embryos do not implant.  The bottom line is that embryo grading is just one more factor we use to help us predict success  .

To learn more about embryo quality, please contact our center on 818-881-9800.  One of our Fertility Specialists will be happy to speak with you.

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The Center for Fertility and Gynecology

The Center for Fertility and Gynecology provides cutting-edge medical care in a patient-oriented and supportive setting. Drs. Michael Vermesh and Tannaz Toloubeydokhti offer all couples the best possible evaluation, diagnosis, and treatment of male and female infertility. Our experienced physicians are affiliated with:

  • American Association of Gynecologic Laparascopists
  • ACOG: American College of Obstetricians and Gynecologists
  • American Medical Association
  • ASRM: American Society for Reproductive Medicine
  • Pacific Coast Reproductive Society
  • Resolve: The National Infertility Association
  • SREI: Society for Reproductive Endocrinology and Infertility
  • The Seed Fertility Program

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