Which of the following is the first change that occurs to t… | CGP Edu

Biology Human Reproduction Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 20, 2026

Which of the following is the first change that occurs to the zygote after fertilization?

A

It divides to form a hollow ball of cells, called the blastocyst.

B

It begins to secrete the hormones.

C

It contacts the endometrial wall of the uterus and becomes buried inside it.

D

It initiates the formation of a placenta.

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