Human Fetus at 28 Weeks in the Womb (Brown Skin)

Description

At approximately 28 weeks of gestation the fetus lies curled within the amniotic cavity, head presenting toward the lower uterine segment, limbs flexed against the torso and one foot drawn up beside the opposite knee. The scalp carries visible hair, the eyelids remain closed, and the subcutaneous fat layer has begun to smooth the contours of the cheeks, trunk and limbs. The umbilical cord leaves the abdominal wall at the umbilicus and spirals freely through the amniotic fluid, its two umbilical arteries and single umbilical vein distinguishable by colour as they converge on the placental insertion. The discoid placenta is applied to the uterine wall behind the fetus, its fetal surface showing the branching chorionic vessels radiating from the cord root. Twenty-eight weeks marks the opening of the third trimester and a threshold used routinely in obstetric counselling, since survival with neonatal intensive care is high from this point and lung maturity, thermoregulation and weight gain become the dominant concerns. The depicted relationships underlie standard antenatal assessment: fundal height and estimated fetal weight, presentation and lie on Leopold manoeuvres, amniotic fluid index, and Doppler interrogation of the umbilical artery for placental insufficiency. Cord coiling, cord position relative to the neck and limbs, and the site of placental insertion are all points of ultrasound reporting at this stage. The image suits antenatal education handouts and pregnancy-week timelines, midwifery and obstetric nursing teaching, embryology and developmental anatomy lectures, and editorial or app content tracking fetal growth week by week. It also serves publishers and device companies illustrating third-trimester monitoring, cord and placental anatomy, or preterm birth counselling material. Anatomical accuracy verified by SciePro's Medical Advisory Board.