Most of the times isolated unossified nasal bone doesn’t create any problems. It is just delayed normal ossification. Just for the doubt raised you Can do a quadruple test dear . Mostly quadruple test will also be normal and then don’t worry about it.
Next Steps
It is common finding that sometimes raises doubts.
Health Tips
Continue iron and
calcium supplements
Take a boiled egg daily
Mothers Horlicks two spoons with milk two times a day for a month