Human Fetus at 39 Weeks in the Womb (Brown Skin)

Description

A full-term fetus of about 39 weeks is shown lying in a flexed attitude within the intact amniotic sac, surrounded by amniotic fluid and enclosed by the chorionic membrane and the vascularised uterine wall. The head is well formed with visible scalp hair, a defined external ear and mature facial contours, and one hand is raised toward the cheek while the opposite arm and both lower limbs are drawn against the trunk in the characteristic fetal posture. Subcutaneous fat has smoothed the limbs and abdomen, and the plantar surface of one foot with individual toes is turned toward the viewer. The umbilical cord loops from the umbilicus across the fetal body to its insertion on the disc-shaped placenta, whose chorionic vessels branch over the fetal surface at the right of the field. At 39 weeks the pregnancy is at term: organ systems including the lungs and central nervous system are functionally mature, and vertex presentation with a flexed head is the position that favours normal vaginal delivery. Views of this stage support discussion of fetal lie and presentation, engagement in the pelvic inlet, amniotic fluid volume and rupture of membranes, and placental position and cord insertion relevant to third-stage management. The depicted cord and placental relationship also underpins teaching on nuchal cord, cord compression and the interpretation of fetal heart rate patterns in late gestation. The rendering suits obstetric and midwifery teaching sets, antenatal class handouts and patient-facing material explaining what the baby looks like at term, and it serves as a closing figure in gestational timeline sequences alongside earlier weeks in this series. Publishers, medical educators and ultrasound training programmes can use it to relate sonographic findings to realistic three-dimensional fetal anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.