Which of the following is the stage of embryo development at which implantation occurs in human female?
A
Morula
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B
Zygote
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C
Blastocyst
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D
Neurula
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Solution
The correct option is C Blastocyst The zygote is formed after the fertilization. This zygote now undergoes cleavage and forms an 8-16 cell structure known as morula.
The morula grows and forms the blastocyst, which gets implanted in the uterine wall. The outermost layer of the blastocyst is of trophoblast cells that help in the implantation. The inner cell mass forms the embryo.