Human Fetus in the Womb at 29 Weeks (Asian Skin)

Description

The rendering shows a third-trimester fetus at approximately 29 weeks of gestation lying in a flexed, head-down attitude within the amniotic cavity. The body is curled with the thighs drawn against the abdomen, the knees flexed and one foot with distinct toes brought close to the face, while the hands rest near the chin. Surface detail typical of this stage is visible: fine scalp hair, a well-formed external ear with a defined helix and lobule, rounded shoulders and increasing subcutaneous fat that smooths the trunk and limbs. The umbilical cord leaves the abdomen and spirals upward, its paired umbilical arteries and single umbilical vein twisting around one another beneath the cord surface before inserting into the fetal surface of the placenta, which lies as a thick, vascular disc against the uterine wall behind the fetus. By week 29 the fetus has entered the period of rapid weight gain and brain growth that dominates the third trimester, with lungs producing surfactant, established sleep-wake cycles and coordinated limb movements that mothers perceive as kicks. Depictions of this stage are used when discussing late preterm and moderately preterm birth, antenatal corticosteroid timing, fetal growth restriction and serial biometry on ultrasound. The cord and placental insertion shown here are the anatomy behind clinical concerns such as nuchal cord, cord coiling, velamentous insertion and Doppler assessment of umbilical artery flow, while the fetal lie and presentation illustrated relate directly to decisions about version and mode of delivery. The image suits obstetric and midwifery teaching sets, embryology and developmental anatomy atlases, and week-by-week pregnancy timelines produced by publishers and health services. Clinicians and antenatal educators can use it in counselling material about the third trimester, fetal movement awareness and preterm birth, and agencies can place it in editorial features, apps and device documentation covering fetal monitoring. Anatomical accuracy verified by SciePro's Medical Advisory Board.