Implantation of the embryo takes place in which week of pregnancy?
Correct answer: B. 2nd
- A. 1st
- B. 2nd
- C. 3rd
- D. 4th
Explanation
In the second week of pregnancy, the zygote continues to divide and forms a ball of cells called a blastocyst. The blastocyst further develops as it moves down the fallopian tube and towards the uterus. By the end of the second week implantation of the blastocyst in the endometrium begins.
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About Growth and Development
Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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