The chromosomal finding was triploidy 69,XXY. Triploidy occurs when a fetus has three full sets of chromosomes instead of the normal two and results in lethality during prenatal development. Numerical chromosomal abnormalities include polyploidy, aneuploidy, and nullisomy/disomy in gametes which can cause conditions like Down syndrome (trisomy 21), Patau syndrome (trisomy 13), Edwards syndrome (trisomy 18), Turner syndrome (monosomy X), and Klinefelter syndrome (47,XXY).