At present, there is no clinical data to predict the probability of Down’s syndrome with short nasal bone. Short nasal bone may be caused by slow development, genetic factors or Down’s syndrome.
1. Slow development: If the development is lower than average but within the normal range, it may be due to the small size of the fetus and developmental delay, so the nasal bone is small.
2. Heredity: some fetuses with small nasal bone may be the result of abnormalities in the development of the fetal nasal bone, such as bilateral absence of nasal bone, unilateral absence of nasal bone, and short nasal bone, which may be related to heredity.
3. Down’s syndrome: If genetic factors are excluded, it is necessary to consider whether there is Down’s syndrome. Down’s syndrome can be characterized by short nasal bone, which is much lower than normal, or missing nasal bone.
There are other causes of nasal bone shortening that may not necessarily be due to Down syndrome. It is advisable to follow the doctor’s instructions for further examination to determine the cause of the condition, and to have the condition treated with appropriate management or therapy.