Human Fetus at 23 Weeks in the Womb (Brown Skin)

Description

A fetus of about 23 weeks gestation lies curled in the amniotic cavity, seen at close range with the head in the lower foreground and the trunk and limbs folded above it. The scalp carries fine downy hair, the external ear (auricle) is fully modelled with a defined helix and lobule, and the eyelids remain fused. Flexed at the hip and knee, the lower limb crosses the abdomen while the arm and hand with distinct fingers rest against the chest and shoulder. The umbilical cord emerges from the abdominal wall in its characteristic helical twist, the single umbilical vein and paired umbilical arteries indicated by contrasting colour beneath the amniotic covering, and the reddish uterine wall closes the background. Week 23 sits at the threshold of extrauterine viability, when pulmonary development advances into the late canalicular and early saccular stages and surfactant production begins. The features shown here correspond to what is assessed sonographically at this point in the second trimester: biometry of the head, limb posture and tone, cord insertion at the abdominal wall, and the three-vessel cord appearance on transverse section. Cord coiling of the kind depicted is normal and relevant to discussions of hypocoiling, hypercoiling, true knots and nuchal cord, while the flexed limb attitude and preserved amniotic fluid volume are markers of fetal wellbeing. The image suits obstetric and midwifery teaching on second-trimester growth, embryology and prenatal development lectures, and antenatal counselling material where parents want a realistic sense of their baby's appearance at this stage. It also serves textbook and atlas figures, neonatal and perinatal medicine presentations on periviability, and editorial or app content tracking pregnancy week by week, and it pairs with the companion renderings at weeks 20, 21 and 22 in the same series. Anatomical accuracy verified by SciePro's Medical Advisory Board.