Pregnant Woman Showing The Gestational Stage of Pregnancy at Week 15

Description

Cut away in a sagittal cross section, the gravid uterus contains a 15 week conceptus suspended within the amniotic sac and surrounded by amniotic fluid. Superiorly along the uterine wall, the placenta forms a broad attachment to the decidua, with the umbilical cord coursing from the fetal umbilicus to the chorionic plate. The fetus rests in flexion, with the head oriented relatively superior and the developing trunk and limbs positioned more inferiorly within the uterine cavity. Around week 15, uteroplacental circulation is established and placental location becomes a practical landmark when discussing placenta previa risk later in gestation, even though the apparent position can change as the lower uterine segment develops. Cord insertion and the relationship of the placenta to the internal os are also key teaching points when correlating ultrasound findings with mechanisms of second trimester bleeding. Small details matter. This is also the stage when amniocentesis is commonly performed, so a clear depiction of the amniotic cavity, uterine wall, and fetus supports procedural anatomy and counseling. Use this illustration in obstetrics and embryology teaching decks to anchor “week 15” developmental expectations, and in patient education materials that explain the womb, placenta, and umbilical cord without resorting to oversimplified diagrams. It also suits textbooks and review articles that introduce second trimester screening, ultrasound orientation, or the basic anatomy relevant to amniocentesis. Anatomical accuracy verified by SciePro's Medical Advisory Board.