The process of attachment of the embryo to the lining of the uterus in the endometrium is known as implantation.
The process of implantation occurs mostly 7 days after ovulation.
The embryo in the blastocyst stage gets implanted in the uterus.
The uterus has three layers the perimetrium the outermost layer, the myometrium the middle thickest muscular layer, and the endometrium which is the glandular layer.
Endometrium proliferates itself during the menstrual cycle which helps in the implantation of the embryo.
Final answer: Implantation of the embryo occurs in the uterus.