TABLE 3.

The details of fetal karyotypes, placental tissues analysis, pregnancy results, and false negative reasons for false negative cases.

Case	Fetal karyotypes	Placental tissue analysis	Pregnancy results	False negative reasons
Case 1	46, XY, +21, [rob (21;21) (q10;q10)]	N/A	TOP, male	Uncertain
Case 2	47, XY, +21	N/A	Born, male	Borderline unique reads
Case 3	47, XY, +18	N/A	TOP, male	Uncertain
Case 4	47, XY, +21	N/A	Born, male	Uncertain
Case 5	47, XX, +18	N/A	Born, female	Uncertain
Case 6	47, XY, +21	N/A	TOP, male	Uncertain
Case 7	47, XY, +18	Placental-fetal side: 47, XY, +18 Placental-maternal: 45, XY, −18	TOP, male	CPM
Case 8	47, XY, +21	Placental-fetal side: 46, XY; Placental-maternal side: 46, XY/69, XXY; Umbilical cord: 47, XY, +21	TOP, male	CPM
Case 9	47, XY, +18	N/A	Left: born, male; Right: TOP, male	Twin pregnancy low fetal fraction

BMI, body mass index; CPM, confined placental mosaicism; N/A, not applicable; TOP, termination of pregnancy.