Pregnant Woman at 16 Weeks, Lateral View (Black Skin)

Description

The torso of a pregnant woman is shown in left lateral profile, one hand resting on the lower abdomen and the other on the lumbar region, while the abdominal wall is rendered semi-transparent to expose the gravid uterus and neighbouring pelvic viscera. At approximately 16 weeks of gestation the uterine fundus has risen out of the true pelvis toward a level midway between the pubic symphysis and the umbilicus, displacing loops of small intestine and the sigmoid colon superiorly and posteriorly. The fetus lies curled within the amniotic sac in a flexed attitude, the umbilical cord passing from the ventral abdominal wall to the placenta implanted on the uterine wall. Behind and below the uterus, the rectum, sacrum and lumbar vertebrae are visible, with the urinary bladder and vagina anterior and inferior, framed by the pelvic bone. This sagittal-style relationship is the anatomy behind mid-second-trimester clinical assessment: fundal height measurement, palpation of the uterus above the pelvic brim, and the changing position of the bladder and rectum as the uterus enlarges. Week 16 is also the period of routine second-trimester screening, when fetal biometry, placental site and amniotic fluid volume are documented by ultrasound and maternal serum screening is offered. The depicted lumbosacral posture and forward shift of the centre of gravity explain the low back and sacroiliac discomfort commonly reported at this stage, while bowel displacement underlies constipation and altered abdominal comfort. The image suits obstetric and midwifery teaching sequences that track uterine growth week by week, antenatal patient education leaflets and apps, and textbook or journal figures on second-trimester maternal and fetal anatomy. It is equally useful for prenatal class visuals, pharmaceutical and device communication aimed at maternity care, and public health material for expectant parents. As part of a matched weekly series, it allows direct comparison of fetal size and uterine position across gestation. Anatomical accuracy verified by SciePro's Medical Advisory Board.