Answer:
In humans, implantation is the stage of pregnancy at which the embryo adheres to the wall of the uterus. At this stage of prenatal development, the conceptus is called a blastocyst. It is by this adhesion that the embryo receives oxygen and nutrients from the mother to be able to grow.
Explanation:
Implantation happens very early on in pregnancy, soon after the female egg cell has been fertilized by sperm in the fallopian tubes. The fertilized egg then travels down the fallopian tubes, transforming from a single cell to a ball of multiple cells called a zygote. This zygote then implants into the uterus lining. Usually, implantation occurs five to six days after ovulation (when the egg cell is released from an ovary).
