Of course. Cashew nuts are very rich source of vitamins and lots of other nutrients as well. So it ideal to be consumed during pregnancy. Also its anti-bacterial properties help to fight against infections. Although you may need to avoid cashews if you have certain allergies of it. On the other hand , Mangoes are rich in iron, vitamin C, vitamin A, potassium and folic acid which are all vital nutrients for your pregnancy. They are also rich in fibre, which can help to prevent constipation. Also they are good source of energy and antioxidants. But because of its high sugar content, you may be advised to avoid mangoes if you have gestational diabetes. So go according to your condition. All the best and take care.