Fetus at Gestational Week 18

Description

Curled in a typical flexed intrauterine posture, the fetus is presented with a disproportionately large cranium relative to the trunk, with recognizable facial anatomy including the eyelids, external nose, auricles, and developing mandible. Upper and lower limbs are well formed, and the hands and feet show distinct digits with the wrists and ankles held in flexion near the anterior torso. An umbilical cord courses from the fetal umbilicus to an attached placenta, and the cord is rendered with enough detail to suggest its surface vessels. Translucent fetal skin allows a sense of underlying contour while preserving external landmarks. Although the title references gestational week 18, the degree of somatic maturation implied by digit definition, facial refinement, and the placental cord detail aligns more closely with late second trimester teaching points, when viability counseling, anatomic survey ultrasound, and growth assessment dominate clinical conversations. This is the window in which umbilical cord insertion, placental location, and fetal posture become practical interpretive issues on imaging, and where congenital anomalies can be correlated with expected external proportions. The placenta and cord relationship also supports discussion of single umbilical artery and abnormal placentation, both of which influence prenatal surveillance. Use this asset in embryology and human development modules to anchor staged fetal growth, or in obstetrics and maternal fetal medicine materials that pair illustrations with mid pregnancy ultrasound findings. It also reproduces well in patient education pieces explaining fetal size, placental function, and cord anatomy during the second trimester. Anatomical accuracy verified by SciePro's Medical Advisory Board.