After IVF, six embryos are seen in a laboratory dish…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
After IVF, six embryos are seen in a laboratory dish. They have , , , , and blastomeres. The clinic follows the NCERT rule for the site of the transfer.
- How many of the embryos are suitable for a transfer into the fallopian tube?
- How many are suitable for a transfer into the uterus?
- After how many divisions of a single zygote does an embryo reach blastomeres?
Need a reminder? The key ideaShow
In IVF, ZIFT and ICSI, the gametes meet in a dish. In GIFT, AI and IUI, they meet in the body of the woman. A zygote or an embryo of up to blastomeres goes into the fallopian tube, and a larger one goes into the uterus. If each of embryos implants with chance , on its own, the chance of none is .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Embryos with , , , , and blastomeres.
Plan. Sort them by the rule of blastomeres.
Step 1. The tube. Up to blastomeres: the embryos with , , and . That is .
Step 2. The uterus. More than : the embryos with and . That is .
Step 3. The divisions. , so divisions.
Answer: ; ; divisions.
Check. , the number of embryos.
Watch out. An embryo of exactly blastomeres goes into the fallopian tube. The rule says up to .
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