Here is a picture at 8 weeks. Is this enough "human being characteristics" for you? I remember my son's eight week ultrasound--how amazing to see those little limbs moving!
It is amazing how small they are, and how early they begin to look like a little person.
I'm in the medical field and work in an OR. At the time of this event I worked at a Catholic Hospital so clearly we did not do elective terminations. One Sunday morning I was called in to help do a termination on a 13-14 week pregnancy.
This particular pregnancy was not inside the uterus, but was intra-abdominal and the placenta had attached and was infiltrating the broad ligament that attaches the uterus to the side wall of the abdomen. The mother was starting to bleed into the abdomen. the Ethics powers that be in the hospital met and decided that the bleeding was significant enough that the mothers life was at risk and the termination could proceed.
That day made quite an impact on me. A small little person was taken out of the mother's abdomen that day. The room was silent and there wasn't a dry eye among the OB/Gyn, 2 nurses or Anesthesiologist. There was a chaplain around too. I pray over that day often.