Karling wrote:I had my ET yesterday and the 2 embryos they transfered were not at the blastocyst stage yet. They said they were Morlulas (sp????). Can anyone tell me more about this? What exactly does it mean? Are my chances that they will stick decreased because they wern't blasts yet? One was listed as a 5 (scale of 1-5, 5 being best) and one was a 3.
Thanks for the help!
After fertilization, embryos go through a stage called the cleavage stage. This is when the one cell spits to two, then to four, then to eight.
At the end of the cleavage stage, they enter a stage called compaction, as the cells join tightly with each other. they seem to be working out a plan, deciding which cells will perform which functions in the blastocyst stage.
An embryo in this compacted stage called a morula. (The plural is morulae, by the way.) Every embryo must go through this stage to be viable.
You probably had a day 5 transfer. A day 5 morula would probably become a day 6 blastocyst, so should have roughly the implantation rate of a day 6 blast. That's a little lower than for a day 5 blast. Of course it varies from one clinic to the next, but it should be somewhere near 30% per embryo.
Most clinics don't like to transfer morulae because they are more difficult to grade.
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