Human Fetus at 25 Weeks in the Womb (Asian Skin)

Description

A fetus of approximately 25 weeks gestation lies in a flexed attitude within the intact amniotic sac, surrounded by amniotic fluid and enclosed by the vascular uterine wall. The head is disproportionately large relative to the trunk, with a rounded cranial vault, a well modelled external ear, a broad nose and closed eyelids that remain fused-appearing at this stage. The upper limb is drawn toward the face with the hand near the chin, while the lower limbs are folded at hip and knee with the sole and toes clearly visible. The umbilical cord leaves the abdomen at the umbilicus, loops once and spirals toward the central insertion on the fetal surface of the discoid placenta, where branching chorionic vessels radiate beneath the amnion. Twenty-five weeks falls within the periviable to early third-trimester window, when survival with neonatal intensive care becomes appreciable and antenatal corticosteroid decisions are weighed. At this age the lungs are in the canalicular to early saccular phase, surfactant production is beginning, and rapid subcutaneous fat and brain growth are underway. The illustrated relationships between cord insertion, placental disc and uterine wall correspond to features assessed at routine ultrasound, including placental position and location, cord insertion site, amniotic fluid volume and fetal lie, all relevant to growth restriction surveillance and counselling about preterm birth. The image supports obstetric and midwifery teaching, antenatal class handouts, and patient-facing material explaining what a baby looks like at the end of the second trimester. It suits embryology and human development atlases, neonatology and NICU counselling resources, pharmaceutical and prenatal care publishing, and editorial figures where a consistent week-by-week series of intrauterine views is required. Anatomical accuracy verified by SciePro's Medical Advisory Board.