The relationship between fetal tissue chromosomal karyotype and clinical characteristics in patients with spontaneous abortion: a retrospective study

The results of this study indicate that fetal tissue chromosomal abnormalities are the primary factor leading to SA. Additionally, advanced maternal age (> 35years), early pregnancy (< 12 weeks), and the fewer number of previous pregnancy losses (≤ 4 times) are associated with a higher risk of fetal tissue chromosomal abnormalities following miscarriage.