Human Fetus at 22 Weeks in the Womb (Caucasian Skin)

Description

At approximately 22 weeks of gestation the fetus is shown in a flexed intrauterine posture, enclosed by the translucent amniotic sac and suspended in amniotic fluid. The head is disproportionately large relative to the trunk, with a smooth calvaria, fused eyelids, a formed auricle, and a broad nasal bridge; the upper limb is drawn toward the mouth so the fingers rest against the lips, while the lower limbs are folded with the plantar surfaces and separated toes clearly visible. The umbilical cord loops in front of the face and neck, its paired umbilical arteries and single umbilical vein distinguishable through the cord surface as it courses back toward the placental tissue and richly vascularised uterine wall framing the gestational cavity. The second trimester at 22 weeks is a clinically pivotal window: it is around the accepted threshold of viability, and the anatomy survey scan performed in this period evaluates biometry, limb and digit counts, facial profile, and cord vessel number. The cord loops seen near the face and neck illustrate the anatomy behind nuchal cord findings on ultrasound, while hand-to-mouth positioning reflects the swallowing and sucking reflexes that support amniotic fluid turnover and later feeding. Amniotic fluid volume, placental site, and cord insertion assessed at this stage inform surveillance for growth restriction, oligohydramnios, and polyhydramnios. This rendering suits obstetric and midwifery teaching sequences that track development week by week, prenatal atlases, and antenatal classes where expectant parents want a realistic sense of fetal size and posture. It also serves ultrasound training material correlating sonographic landmarks with three-dimensional anatomy, editorial and publication figures on second-trimester development, and clinic-based patient education on cord anatomy and fetal movement. Anatomical accuracy verified by SciePro's Medical Advisory Board.