Human Fetus in the Womb at 20 Weeks, Lateral View (Asian Skin)

Description

The fetus lies in a flexed, curled posture within the uterine cavity, presented in lateral profile with the head uppermost and the trunk rotated slightly toward the viewer. The rounded calvaria is smooth and still disproportionately large relative to the body, the auricle of the external ear is fully modelled with a defined helix, and the eyelids remain fused over the developing globes. The upper limbs are folded across the chest with the fingers apposed near the mouth, while the flexed knees bring the feet, with clearly separated toes and plantar creases, up against the abdomen. The umbilical cord emerges from the anterior abdominal wall and spirals toward the discoid placenta behind the head, its paired umbilical arteries and single umbilical vein visible through the translucent Wharton's jelly against the vascularised uterine wall. At twenty weeks the fetus sits near the midpoint of gestation, the stage at which the detailed anomaly ultrasound is conventionally performed and biometry such as biparietal diameter, head and abdominal circumference and femur length are recorded. This lateral orientation shows the physiological flexion attitude, cord insertion site and placental position that sonographers assess when documenting lie, cord coiling and placental location. Ear formation, eyelid fusion and digit separation at this age are useful morphological reference points, and the cord vessel arrangement underpins discussion of single umbilical artery, cord entanglement and the fetoplacental circulation. The image suits obstetric and midwifery teaching on second-trimester development, embryology and prenatal anatomy lectures, and antenatal atlases that track growth week by week alongside companion renderings at 21 and 22 weeks. It also serves patient-facing pregnancy guides, antenatal class handouts and journal or app figures where a clear, realistic depiction of fetal posture, cord and placenta is needed. Anatomical accuracy verified by SciePro's Medical Advisory Board.