Final answer:
The presence of yellow amniotic fluid with particles indicates meconium staining, which is the first stool passed by a newborn. It consists of ingested amniotic fluid, cellular debris, mucus, and bile.
Step-by-step explanation:
The presence of yellow amniotic fluid with particles indicates that the amniotic fluid is meconium-stained. Meconium is the first stool passed by a newborn, consisting of ingested amniotic fluid, cellular debris, mucus, and bile. It is normally greenish or yellowish in color and indicates that the baby has had a bowel movement in utero.