5 Day Blastocyst Implantation Timeline. The term "implantation" is used to describe process of attachment and invasion of the uterus endometrium by the blastocyst (conceptus) in placental animals. Process by which the mammalian blastocyst physically connects with the uterus of the mother.
The implanting mouse blastocyst invades the uterine stroma and undergoes a dramatic transformation into an egg cylinder.
What mediated initial attachment of the blastocyst to the uterus?
Implanting gives the blastocyst a blood supply so that it can start growing into a fetus. Process by which the mammalian blastocyst physically connects with the uterus of the mother. Blastocyst is the stage in which embryo implantation to the uterus occurs naturally.

