Fetus at Gestational Week 17

Description

Curled in a typical flexed posture, the 17 week human fetus is shown suspended within the amniotic cavity, with the head held in relative flexion and the knees drawn toward the anterior abdominal wall. Distinct facial contours, the external ears, eyelids, and the developing nasal and oral regions are apparent, while the thorax and abdomen sit centrally with the upper limbs crossed near the chest and the lower limbs folded inferiorly. A spiraled umbilical cord courses from the fetal umbilicus toward the placental attachment site (placenta not included), floating freely in amniotic fluid and framed by the inner surface of the amniotic sac. Gestational week 17 sits in the mid second trimester, a window when fetal biometric assessment becomes clinically actionable and malformation screening begins to focus on anatomy rather than viability. This presentation supports teaching around expected proportional changes (head still comparatively large, trunk and limbs lengthening) and the relationship of the cord to the anterior abdominal wall, a point of reference when discussing ventral wall defects such as omphalocele and gastroschisis, or cord complications including true knots and abnormal insertion. Skin translucency also fits the stage before substantial subcutaneous fat deposition. A developmental snapshot. Use this asset in embryology and obstetrics teaching modules, second trimester screening lectures, and patient education materials explaining normal fetal development without introducing placental anatomy. It also reads well as a figure for gestational dating discussions in medical textbooks, CME content, and prenatal counseling brochures. Anatomical accuracy verified by SciePro's Medical Advisory Board.