Human Fetus at 37 Weeks in the Womb (Asian Skin)

Description

A fetus at 37 weeks of gestation lies curled in the amniotic cavity, shown in the characteristic flexed attitude of late pregnancy: spine convex, hips and knees drawn up, arms folded across the chest with one hand resting near the face. The head is well developed and covered with dark scalp hair, the external ear is fully formed with firm cartilage, and subcutaneous fat has smoothed the contours of the limbs, cheeks and trunk. The umbilical cord is seen coiling between the fetal abdomen and the fetal surface of the placenta, its paired umbilical arteries and single umbilical vein distinguished by colour along the spiralling vessels. The placental disc lies against the uterine wall, which encloses the fetus in a narrowing space that limits movement at term. At 37 weeks the pregnancy is considered early term, and this view illustrates the anatomical facts that drive late-gestation obstetric care: fetal lie and presentation, degree of flexion, cord position relative to the neck and limbs, and placental implantation site. Clinicians assess these features by ultrasound and Leopold manoeuvres when planning vaginal delivery, external cephalic version or caesarean section. The rendering also supports discussion of cord coiling and nuchal loops, placental insertion and the reduced amniotic volume that accompanies advancing gestational age, together with the maturation of fetal lungs, thermoregulation and subcutaneous fat that determine readiness for birth. The image suits obstetric and midwifery teaching, antenatal class handouts and prenatal atlases showing the progression of gestation week by week, and pairs directly with earlier images in this series at 20, 21 and 22 weeks. It is equally useful for patient education about term delivery, for publisher figures in embryology and obstetrics texts, and for ultrasound training material that benefits from a realistic reference of fetal posture in utero. Anatomical accuracy verified by SciePro's Medical Advisory Board.