Human Fetus in the Womb at 23 Weeks (Asian Skin)

Description

The fetus lies in the amniotic cavity in the characteristic flexed attitude of the second trimester, head lowermost and turned toward the viewer so the external ear and the still-prominent cranial vault are visible. The knees are drawn up against the trunk, one hand rests near the chin and the plantar surface of the foot with its individual toes is turned upward, illustrating how limited space obliges the limbs to fold across the body. The umbilical cord emerges from the abdominal wall between the flexed thighs, its coiled umbilical vein and paired umbilical arteries indicated in colour, and passes to the discoid placenta implanted along the upper uterine wall. Fine vessels within the placental disc and the surrounding myometrium complete the maternal-fetal interface, while the translucent skin still shows the reddish tone of an underdeveloped subcutaneous layer. At about 23 weeks the fetus sits at the threshold of extrauterine viability, so this stage is the reference point for counselling on periviable birth, antenatal corticosteroid timing and neonatal intensive care planning. The depicted proportions, head-to-body ratio and limb posture correspond to what sonographers measure at the mid-trimester anatomy scan, including biparietal diameter, femur length and abdominal circumference. Cord insertion and placental position are equally relevant, since anterior or fundal implantation, cord coiling and vessel number are routinely documented at this gestation and influence surveillance for growth restriction. The image suits obstetric and midwifery teaching sequences that track development week by week, embryology and human development textbooks, and antenatal class or clinic materials that show expectant parents what the fetus looks like in the middle of pregnancy. It also serves neonatology lectures on prematurity, ultrasound training resources and editorial or publication figures on fetal growth and placental anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.