Figure 1: Photomicrographs of control group of human placenta showing; a) A full-term placenta includes sections of many villus stems (V), containing blood vessels (BV), smaller villus branches (arrows) which contain connective tissue and microvasculature, (H&E 10X). b) A higher magnification of previous micrograph, denoting the villus connective tissue contains blood vessels (BV), nuclei of the syncytiotrophoblast layer have formed clusters or knots (K) on the surfaces of villi, (H&E 20X).Inset