A nurse is reinforcing teaching with a 36-year-old client who is at 16 weeks of gestation and is scheduled for an amniocentesis. The nurse should include in the teaching that an amniocentesis is performed to identify which of the following findings?

A. Chromosomal abnormalities: Amniocentesis performed between 15 and 20 weeks of gestation allows for analysis of fetal cells in the amniotic fluid to detect chromosomal abnormalities, such as Down syndrome, trisomy 18, and other genetic disorders. B. Rh incompatibility: Rh incompatibility is assessed via maternal blood typing and antibody screening, not through amniocentesis. Amniocentesis is not routinely used to evaluate Rh status. C. Placental circulation: Placental circulation is typically evaluated using Doppler ultrasound or other imaging techniques, not amniotic fluid sampling. D. Fetal breathing movements: Fetal breathing movements are assessed by ultrasound to monitor fetal well-being. Amniocentesis does not provide information about fetal respiratory activity.