Human Fetus at 11 Weeks in the Womb (Caucasian Skin)

Description

A fetus at approximately 11 weeks of gestation lies in a flexed posture within the translucent amniotic sac, seen from the left side. The head remains large relative to the trunk, with the prominent forehead, pigmented developing eye beneath fused eyelids, a formed nose and lips, and an external ear (auricle) already positioned on the side of the head. The upper limb is flexed toward the face with separated fingers on the hand, while the lower limbs are drawn up with distinct feet and toes. The umbilical cord leaves the anterior abdominal wall at the umbilical ring and spirals through the amniotic cavity, its intertwined umbilical vein and arteries visible, inserting into the chorionic plate of the placenta, whose vascular tree fans out against the uterine wall. Week 11 marks the transition from the embryonic to the fetal period, when organogenesis is largely complete and growth and maturation dominate. This is the window in which first-trimester ultrasound screening is performed: crown-rump length dating, nuchal translucency measurement, and assessment of the nasal bone and limbs all rely on the proportions and surface features shown here, as does combined screening with maternal serum markers. The image also depicts the anatomy relevant to chorionic villus sampling, placental localisation, and counselling on cord and placental circulation, since fetoplacental exchange at this stage supports rapid somatic growth. The rendering suits obstetric and midwifery teaching on trimester milestones, embryology and developmental anatomy lectures, and antenatal atlases charting week-by-week growth. It works equally well in patient-facing material for early pregnancy clinics and first-trimester screening leaflets, and as a publication or app figure for sonographers, general practitioners and childbirth educators explaining fetal proportions, amniotic sac and placental relationships. Anatomical accuracy verified by SciePro's Medical Advisory Board.