Karyotyping results can detect the presence of abnormalities in chromosome morphology and number. 46XN indicates that the number of fetal chromosomes in the abdomen is normal. Karyotyping results can be used to detect the presence of chromosomal and inborn metabolic disorders in the fetus. The normal female chromosome is 46XX, and the male chromosome is 46XY. If the karyotype result is 46XN and there are no other abnormalities, the fetal chromosome number and morphology are not abnormal, and the chromosomes are normal. It is recommended that pregnant women should not be over-anxious during pregnancy, relax their moods, go to the maternity checkups on time, and seek timely medical treatment for any abnormalities, complete the relevant examinations, and standardize the treatment.