Question

In human females, the fertilised egg gets implantation in uterus

• A. After two months of fertilisation
• B. After one month of fertilisation
• C. After three weeks of fertilisation
• D. After about eight days of fertilisation

Answer 1

The correct option is D After about eight days of fertilisation

The fertilised egg or zygote undergoes several divisions to form the embryo. It moves into the uterus within a period of 4-5 days. In the uterus, the embryo implants itself into the endometrial lining 8-9 days after fertilisation. After implantation, it secretes a hormone called human chorionic gonadotrophin (hCG) which helps maintain the pregnancy.

Thus, the correct answer is option D.