-The level of hCG in urine is tested, high hCG concentration is a strong indication that a female is pregnant.

-The implantation process takes about a week (7 days).

-These are projections from the endometrium and endocytose macromolecules and uterine fluid to decrease the volume of the uterus. This allows the embryo and uterus epithelium to become more closely situated and thus helps implanatation. Therefore the idea that pinopodes may determine the implantation window to some extent is a likely possibility.

-Secretions loosen decidual cells from each other, preventing the embryo from being rejected by the mother, and also trigger the final decidualization stage and prevent menstruation.

 -The blastocyst releases immunosuppressive agents to stop the female immune system from targetting it for degradation, as it would be seen as a foreign body.

-Platelet-activating factor, hCG, early pregnancy factor, immunosuppressive factor, prostaglandin E2, interleukin 1-alpha, interleukin 6, interferon-alpha, leukaemia inhibitory factor and colony-stimulating factor.