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

Description

A fetus of approximately 25 weeks gestation is shown in a tightly flexed intrauterine posture, seen from the left side with the head at lower left and the trunk curving upward to the right. Surface detail includes fine scalp hair, a well-formed auricle with a defined helix and lobule, fused but closed eyelids, a broad nasal bridge with patent nares, and full lips. One hand rests near the face with individual fingers and nail beds discernible, while the lower limbs are drawn up in physiological flexion so that the sole and five toes of one foot lie against the opposite thigh. The umbilical cord crosses obliquely in front of the face and chest, its helical twist revealing the paired umbilical arteries and single umbilical vein beneath the covering of Wharton's jelly. The translucent reddish uterine wall and amniotic space frame the figure. At 25 weeks the fetus is in the late second trimester, a period defined by rapid weight gain, thickening subcutaneous fat, brown adipose deposition, and pulmonary development advancing through the canalicular into the saccular stage with early surfactant production. This is the threshold of viability relevant to counselling on extreme preterm birth, neonatal intensive care planning, and antenatal corticosteroid administration. The depicted cord relationship illustrates why sonographic assessment of nuchal or facial cord loops, cord coiling and vessel number is part of routine mid-gestation and third-trimester surveillance, alongside biometry, amniotic fluid volume and Doppler indices of umbilical arterial flow. The illustration suits obstetric and midwifery teaching sets, embryology and developmental anatomy lectures, and antenatal education material where parents benefit from an accurate impression of fetal appearance and posture at this stage. It also serves neonatology and perinatal counselling resources on viability, journal and textbook figures on fetal growth, and editorial or app content tracking week-by-week development within a consistent series. Anatomical accuracy verified by SciePro's Medical Advisory Board.