It doesn’t matter if you can’t see the nasal bone in the NT test, you can look at the thickness of the posterior cervical zona pellucida at this time. Under normal circumstances, the thickness of the posterior nuchal translucency is less than 3mm, and greater than 3mm indicates the possibility of Down’s syndrome or chromosomal abnormalities. If the mid-term screening is not passed and there are abnormalities, further examination can be done by non-invasive DNA or amniocentesis to further confirm the diagnosis. Therefore, it is not a big problem to see the nasal bone in the early pregnancy NT test, and there is a corresponding test to determine it in the middle pregnancy. Ultrasound can also be used to determine if there is any abnormality at 24 weeks malformation screening. Therefore, the problem of not being able to see the nasal bone in the early stage of pregnancy is not serious, but we must pay attention to it, and we must go to the hospital for the relevant examination in the middle stage of the Down screening or malformation screening.