Progression of Fetal Growth at Week 22

Description

Curled in a typical flexed fetal posture, the conceptus at approximately 22 gestational weeks is presented in lateral profile, with the disproportionately large head positioned superior to the thorax and the flexed hips and knees drawn toward the abdomen. External landmarks are clear, including the cranial vault and face, the auricle of the external ear on the lateral head, and the upper and lower limbs with developing hands and feet held close to the trunk. Long bones of the arm and leg define the limb segments proximally to distally, while the neck remains relatively short as the head sits close to the shoulder girdle. At this stage, clinicians correlate external fetal anatomy with second-trimester imaging, when a routine anatomic survey is performed to screen for structural anomalies and to establish growth parameters. The lateral profile and limb positioning provide a teaching-friendly correlate to ultrasound evaluation of the calvarium and face, extremity development, and gross body proportions, and they also help explain why fetal position can limit visualization of key targets such as the spine, outflow tracts, or hands. Normal maturation around 22 weeks also frames viability discussions and counseling in periviable pregnancies. A specific moment in development. Use this rendering in embryology and obstetrics teaching for gestational staging, in patient-education materials that explain second-trimester development, or in editorial figures accompanying topics such as the mid-trimester anomaly scan and fetal growth assessment. Anatomical accuracy verified by SciePro's Medical Advisory Board.