It was still Jeremiah in the belly no matter what stage of the contruction.
I agree, but it still begs the point, it can't be used to demonstrate that life begins at conception.
Let's take an earlier example: I God came down to you and said "Stevie (He calls you Stevie right?), You began not at the moment of conception but three days later at the moment of implantation" the verse you quoted would still be True. Therefore it cannot prove that life begins at conception and a "morning after" pill would not be sinfull. The same argument could be made for 1,2,or 3 months in the womb.