At what point would a researcher expect to observe a blastocyst forming during pregnancy?
Understand the Problem
The question asks about the timing of blastocyst formation during early pregnancy. It provides multiple choice options with different timeframes, and you need to identify the correct one based on your knowledge of embryonic development.
Answer
Blastocyst formation occurs about 5-6 days after fertilization.
A researcher would expect to observe a blastocyst forming approximately 5 to 6 days after fertilization.
Answer for screen readers
A researcher would expect to observe a blastocyst forming approximately 5 to 6 days after fertilization.
More Information
The blastocyst is a structure formed in early mammalian development. It possesses an inner cell mass (ICM) which subsequently forms the embryo. The outer layer of the blastocyst consists of cells collectively called the trophoblast. This layer surrounds the inner cell mass and a fluid-filled cavity known as the blastocoel.
Sources
- Blastocyst: Definition, Stage & Implantation - Cleveland Clinic - my.clevelandclinic.org
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