Within the sac was a tiny human male, swimming extremely vigorously in the amnionic fluid, while attached to the wall by the umbilical cord. The tiny human was perfectly developed, with long, tapering fingers, feet and toes. It was almost transparent as regards to the skin, and the delicate arteries and veins were prominent to the ends of the fingers. The baby was extremely alive and did not look at all like the photos and drawings of 'embryos' which I have seen. When the sac was opened, the tiny human immediately lost its life and took on what is accepted as the appearence of an embryo at this stage, blunt extremities, etc.
Pregnancy is counted from the first day of a woman's last period.
The picture on the right is a fertilized egg, only thirty hours after conception. Magnified here, it is no larger than the head of a pin. Still rapidly dividing, the developing embryo floats down from the fallopian tube and towards the uterus. Once in the uterus, the developing embyo searches for a nice place to implant, where it actually burrows beneath the surface of the uterus. The yolk sac, shown on the left, produces blood cells during the early weeks of life.