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

Description

The third-trimester fetus lies in a flexed attitude within the amniotic cavity, head turned toward the viewer with eyelids closed, the auricle fully formed and fine scalp hair covering the vertex. The limbs are drawn across the trunk, with the fingers of one hand and the plantar surface of a foot clearly visible against the abdomen; subcutaneous fat has begun to smooth the contours of the cheeks, shoulders and thighs. A spiralled umbilical cord leaves the anterior abdominal wall at the umbilicus, its two umbilical arteries and single umbilical vein rendered in contrasting colour as they wind toward the fetal surface of the discoid placenta. The placenta is applied to the uterine wall behind the fetus, its chorionic plate carrying branching vessels that radiate from the cord insertion. At 28 weeks the fetus is at the threshold of the third trimester, a milestone used clinically for viability counselling, kick-count instruction and the timing of anti-D prophylaxis and glucose tolerance screening in many protocols. Surfactant production, retinal maturation and rapid brain growth are underway, which shapes neonatal outcome expectations should preterm delivery occur. The depicted cord anatomy, with its coiling and three vessels, is directly relevant to ultrasound assessment of cord insertion, single umbilical artery, and Doppler interrogation of umbilical artery flow in suspected growth restriction, while placental position relative to the uterine wall underpins the diagnosis of praevia and abruption. The image supports obstetric and midwifery teaching on fetal growth milestones, antenatal classes and clinic wall charts, and patient-facing leaflets explaining what a baby looks like in the third trimester. Publishers of embryology atlases and pregnancy apps can use it alongside the other weekly stages in this series to build a continuous developmental timeline for students, sonographers and expectant parents. Anatomical accuracy verified by SciePro's Medical Advisory Board.