Human Fetus at 40 Weeks in the Womb (Black Skin)

Description

A fetus at 40 weeks of gestation fills almost the entire uterine cavity, lying on its side with the head low and the trunk flexed in the characteristic curled attitude of late pregnancy. The translucent amniotic membranes enclose a thin remaining volume of amniotic fluid, and the coiled umbilical cord passes from the umbilicus toward the placental surface visible along the uterine wall to the right. Fetal detail is well developed at term: scalp hair, a fully formed external ear, plump subcutaneous fat over the limbs, and distinct hands and feet with formed digits and nails. The upper limbs are drawn toward the chest and the lower limbs are folded across the abdomen, with one foot raised against the membranes. Week 40 marks the expected date of delivery, when the fetus is considered full term and organ maturity, in particular pulmonary surfactant production and thermoregulatory fat stores, is complete. The proportions shown here explain the crowding that reduces fetal movement counts and amniotic fluid volume near term, and the flexed attitude is the reference point for describing presentation, lie and station during obstetric examination. The relationship between cord, placenta and uterine wall is relevant to counselling on cord compression, placental function at term, and the transition to independent respiration and circulation after birth. This rendering suits obstetric and midwifery teaching on term pregnancy and labour preparation, antenatal class handouts and clinic posters, and journal or textbook figures in a week-by-week fetal development series. It is equally useful for patient-facing apps and pregnancy guides for expectant parents, and for medical publishers assembling comparative sequences from mid-gestation to term. Anatomical accuracy verified by SciePro's Medical Advisory Board.