About Lesson
Implantation
It is the process of attachment of the blastocyst to the uterine wall (by the chorionic villi).
After fertilization, the zygote undergoes several mitotic division as it moves down the oviduct.
Its movement is aided by the cilia movements and the contractions of the smooth muscles along the oviduct.
In the uterus, the blastocyst develops finger-like projections called villi, which grow into the wall of the uterus (endometrium).
The villi together with endometrium develop into a special organ called the placenta.
Upon implantation, the blastocyst becomes an embryo.
Ectopic pregnancy: occurs when the zygote fails to move down the oviduct to the uterus but instead is implanted into the walls of the oviduct where it develops.
