<P> The implantation window is characterized by changes to the endometrium cells , which aid in the absorption of the uterine fluid . These changes are collectively known as the plasma membrane transformation and bring the blastocyst nearer to the endometrium and immobilize it . During this stage the blastocyst can still be eliminated by being flushed out of the uterus . Scientists have hypothesized that the hormones cause a swelling that fills the flattened out uterine cavity just prior to this stage , which may also help press the blastocyst against the endometrium . The implantation window may also be initiated by other preparations in the endometrium of the uterus , both structurally and in the composition of its secretions . </P>
<P> The implantation window is characterized by changes to the endometrium cells , which aid in the absorption of the uterine fluid . These changes are collectively known as the plasma membrane transformation and bring the blastocyst nearer to the endometrium and immobilize it . During this stage the blastocyst can still be eliminated by being flushed out of the uterus . Scientists have hypothesized that the hormones cause a swelling that fills the flattened out uterine cavity just prior to this stage , which may also help press the blastocyst against the endometrium . The implantation window may also be initiated by other preparations in the endometrium of the uterus , both structurally and in the composition of its secretions . </P>
where does the blastocyst implant to become an embryo
where does the blastocyst implant to become an embryo
against the endometrium
against the endometrium