small or compact enough to fit or be used on a desk: a desktop calendar. noun. 2. the surface of a desk.
Implantation: A circumvallate placenta is simply a 'accident of implantation and formation. Serendipity often causes some of the medical aberrations that are often seen. Causes of circumvallate placenta - What is a partial circumvallate placenta? What causes it? Implantation. A circumvallate placenta is simply a 'accident of implantation and formation. Serendipity often causes some of the medical aberrations that are often seen.
The human placenta is a hemochorial placenta, which means that maternal blood is in direct contact with fetal trophoblast. The syncytiotrophoblast invades maternal venous sinuses relatively early and invades the spiral arterioles on the 17th or 18th day after conception.