Question

Fertilized ovum is transplanted in uterus after

• A. $1$ day
• B. $7$ day
• C. $8$ day
• D. $10$ day

Answer 1

Answer: (B)

$7$ day

Implantation is a process in which a developing embryo, moving as a blastocyst through a uterus, makes contact with the uterine wall and remains attached to it until birth. The lining of the uterus (endometrium) prepares for the developing blastocyst to attach to it via many internal changes.

Implantation of fertilized ovum takes place about 5-6 days after entering into the uterine cavity and 7 days after ovulation.

So the correct option is '7 days'.