Chromosome 46xx is the normal female chromosome karyotype. 46, xx represents the normal female chromosome karyotype. Where 46 means 46 chromosomes which are 23 pairs of autosomes. And xx represents the sex chromosomes. The sex chromosomes are xx for females and xy for males. If a pregnant woman checks her fetus’s chromosomes are 46, xx, it means that the sex of the fetus is female, and there is no disease with abnormal chromosome number, such as 21-trisomy syndrome, 18-trisomy syndrome, etc. Pregnant women can ensure sufficient nutrition, regular work and rest, and proper exercise to promote the normal development of the fetus. If the chromosome is not 46xx, or 46xy, there is a chromosomal abnormality, the pregnant woman needs to actively seek medical treatment, under the guidance of the doctor for further treatment.