Throughout medical history, “conception” has been equated to “fertilization”, both meaning the union of the sperm and the egg.
However, in the last 30-40 years, “conception” has been quietly and arbitrarily redefined to mean implantation of the human embryo (blastocyst) in the uterus.
This allows for a period of about 6-10 days from fertilization (union of egg and sperm) in the Fallopian tube, until the embryo – about 100 cells in size – arrives in the uterus.
Of course, since EC proponents have changed the definition of conception to mean implantation, they would say that there is no current pregnancy.
On the other hand, most scientists and physicians recognize fertilization as the moment when life begins, and would therefore, call the loss of the human embryo an early abortion.