Is it Islamically permissible to determine the sex of the fetus by placing urine on wheat and barley?

Determining the gender of the fetus is permissible. However, the method mentioned (placing urine on a date) to determine the gender of the fetus has no scientific basis and may be charlatanry and sorcery. Furthermore, it leads to placing impurity on something edible, which contradicts Islamic law that mandates respect for food.