About how many cells make up a blastocyst?

1 Answer
Linica Uday
Nov 22, 2016

A blastocyst comprises of about 200 - 300 cells, following rapid cleavage.

Explanation:

In humans , blastocysts formation begins about 5 days after fertilisation.
The blastocyst has a diameter of about 0.1 - 0.2 mm .
The inner cell mass is also a source of embryonic stem cells.

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