Fetus at Week 21 - Black Skin

Description

Fetus at 21 weeks’ gestation is shown in an alternative pose with the placenta and umbilical cord included in the same frame. The cranial vault sits superior to the thorax and abdomen, with the upper limbs flexed anterior to the trunk and the lower limbs drawn toward the pelvis, a typical second-trimester posture that helps orient proximal to distal anatomy. Placental tissue lies adjacent to the fetal surface, and the umbilical cord courses from the fetal umbilicus to the placental disc, emphasizing the continuous fetoplacental unit against a white background. Black skin tone is represented across the fetal integument. Week 21 anatomy is a workhorse reference point in obstetrics because it aligns with the routine mid-trimester anatomy survey, when biometric measurements (biparietal diameter, femur length) and screening for structural anomalies are commonly performed. The inclusion of both placenta and umbilical cord supports teaching around placental location, cord insertion, and fetal circulation, including the expected three-vessel cord (two umbilical arteries and one umbilical vein) and common variants such as single umbilical artery that can coexist with cardiac or renal anomalies. Strong separation of the fetus from the background keeps the silhouette readable for gestational-age comparison, and the fixed pose helps learners practice consistent directional terminology (anterior, posterior, superior, inferior) without ambiguity. Small details matter here. Use this illustration in embryology and human development modules, OB-GYN lectures on second-trimester ultrasound correlation, patient education material explaining placental function, or publisher figures accompanying sections on fetal growth and congenital anomaly screening. It also fits clinical slide decks discussing placental implantation patterns, cord insertion abnormalities (marginal or velamentous), and fetomaternal procedures performed in mid-gestation. Anatomical accuracy verified by SciePro's Medical Advisory Board.