A 32-year-old woman, G2P1, at 12 weeks gestation undergoes chorionic villus sampling (CVS) due to an increased risk of chromosomal abnormalities detected during her first-trimester ultrasound and screening tests. Findings: CVS Karyotype: Mosaic trisomy 16 in the placental sample, suggesting confined placental mosaicism (CPM). Amniocentesis: Fetal karyotype is normal (46,XX). Placental Tissue Analysis: Mosaicism for trisomy 21 confirmed. Which of the following outcomes is most likely in cases of confined placental mosaicism with a normal fetal karyotype?
