Fetus at Week 12

Description

Fetus at 12 weeks’ gestation appears in a flexed posture with the head disproportionately large relative to the trunk, consistent with first-trimester proportions. Upper and lower limbs are well formed, with separated digits visible distally, and the knees and elbows held in flexion; the face sits anteriorly with developing eyelids and external auricles in their expected lateral positions. The umbilical cord inserts at the anterior abdominal wall and courses to an attached placenta, which lies adjacent to the fetal surface, with the cord bridging between fetus and placental disc within the same frame. Placental tissue is shown as an extraembryonic organ rather than an isolated cord segment. Week 12 marks the transition from embryology to recognizable fetal anatomy and sits squarely in the window for routine first-trimester assessment, including crown-rump length dating and evaluation of nuchal translucency at 11 to 13+6 weeks. A single, uncluttered perspective makes it easier to teach common landmarks and also to discuss what should no longer be present at this stage, such as persistent physiologic midgut herniation, which normally resolves by around 10 to 12 weeks and raises concern for omphalocele when seen beyond this period. Placental and cord inclusion supports discussion of chorionic villus sampling (typically 10 to 13 weeks) and the clinical relevance of cord insertion variants. Use this illustration in embryology and obstetrics teaching decks, first-trimester prenatal care handouts, and publishing figures that need an anatomically grounded reference for week-12 development with placenta and umbilical cord in situ. Perfect for side-by-side comparison with ultrasound schematics and screening timelines. Anatomical accuracy verified by SciePro's Medical Advisory Board.