I might sound silly but could someone explain the grading to me. We were never told the grade of our embryos other than the first time was a good grade “nice” blastocyst and the second time we had a grade 2 which was an early blastocyst and 3 grade 3’s which were multiple cell growth but not reached the blastocyst stage. Thanks
Embryo grading : I might sound silly... - Fertility Network UK
Embryo grading
![Butterfly321 profile image](https://images.hu-production.be/avatars/ef97973a96e94f7fb2da6cebe5f83965_small@2x_100x100.jpg)
![Butterfly321 profile image](https://images.hu-production.be/avatars/ef97973a96e94f7fb2da6cebe5f83965_small@2x_100x100.jpg)
As I understand it its numbers 5-1. 5 being the best. Something to do with fragmentation. Then A-D for the baby (which I think is the outer layer) and A-D for the placenta (which I think is the inner part).
So top grade is 5AA, 5AB, 5BA and so on.
I have seen others grading them with another system but dont understand it. However, I've known people to have a 5AA transferred and it's been unsuccessful. My friend had a frozen transfer with 3BB and is pregnant. So it's not always on the numbers.
Hope this helps.xx
![DianeArnold profile image](https://images.hu-production.be/avatars/ad50d2a156b240b958c599820511e368_small@2x_100x100.jpg)
Hi Butterfly. Grading is a complicated business, and clinics have their own systems. Obviously anything grade 5 is the best. Anything below that is ok but is slightly slower in multiplying. A grade 4 or 3 can carry on developing once transferred, so they are worth giving them a go. Check with your clinic if you can, and see what system they use. Hope all goes well. Diane
I thought the numbers reflect the age in days and the letters reflect the quality?