Sorry let me re-word that question for you so it actually makes more sense. Where are my references?

Well thank you for asking here.

At 18 days [when the mother is only four days late for her first menstrual period], and by 21 days it is pumping, through a closed circulatory system, blood whose type is different from that of the mother.

Reference:J.M. Tanner, G. R. Taylor, and the Editors of Time-Life Books, Growth, New York: Life Science Library, 1965, p.12

How early do some organs form?
The eye, ear and respiratory systems begin to form four weeks after fertilization.

Reference:K. Moore, Before We Were Born, 3rd ed., 1989, p. 278

And function?
Very early, e.g., glucagon, a blood sugar hormone, has been demonstrated in the fetal pancreas 6 weeks after fertilization, and insulin by 7 to 8.Thumbsucking has been photographed at 7 weeks after fertilization.

Reference: W. Liley, The Fetus As Personality, Fetal Therapy, 1986, p. 8-17
F. Cunningham, "Pancreas," William’s Obstet., 19th ed., 1993, p. 183-4

At what point are ALL his body systems working?
By 11 weeks.

Reference: "Life Before Birth," Life Magazine, Apr. 30, 1965, p. 13

Any more questions so I can roffle stomp you harder sir?

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