Human Embryo at 10 Weeks' Gestation.

A 29-year-old woman presented to the hospital with an angular pregnancy diagnosed at 60 days of gestation. Ultrasonography 1 week later showed a thinner cornual muscle with a thickness of 2.8 mm. The patient decided to terminate the pregnancy after informed consent was provided. A diagnostic hysteroscopy revealed an angular pregnancy and typical structures such as a decidua capsularis, smooth chorion, extraembryonic coelom, umbilical vesicle (yolk sac), amnion, umbilical cord, vitelline artery and vein, umbilical arteries and vein, decidua basalis, and villous chorion (Figures 1 and 2 and Video). A good visualization of the embryo was achieved, including the large head, scalp vascular plexus, auricle of external ears, eyelids, eyes, nose, mouth, shoulders, arms, elbows, wrists, fingers, knees, toes, and external genitalia. The direct visualization clearly demonstrated features of early human embryo development. The patient recovered well after the termination of pregnancy. Guo. Human embryo at 10 weeks’ gestation. Am J Obstet Gynecol 2022. Guo. Human embryo at 10 weeks’ gestation. Am J Obstet Gynecol 2022.