Identify the human development stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two together.
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Options

A. Developmental stage-Blastocyst, Site of occurrence-Uterine wall
B. Developmental stage-8celled morula, Site of occurrence-Starting point of fallopian tube
C. Developmental stage-Late morula, Site of occurrence-Middle part of Fallopian tube
D. Developmental stage-Blastula, Site of occurrenec-End part of fallopian tube

Answer

A

Explanation

The embryo with 8-16 blastomeres is called a morula, and is present in the end part of fallopian tube. Morula forms the blastocyst as it reaches the uterine cavity and them blastocyst implants in the endometrium. Thus, the options (2), (3) and (4) are wrong.