Calcium oxalate is by far the most common type of kidney stone. Less frequently, uric acid can cause stones. (This is the same chemical compound that is the cause of gout.) Struvite, xanthine, and other types of stones are rare. Some stones are combinations of these minerals and chemicals.
Your doctor will give you a schedule of all the doctor's visits you should have while pregnant. As your pregnancy progresses, you'll see your doctor more often. Most experts suggest you see your doctor: about once each month for the first six months of pregnancy. every two weeks for the seventh and eight month of pregnancy.
Your doctor may order an ultrasound scan at any time during your pregnancy. The most common time to have one is between the 16th and 20th week of pregnancy. But you may have an ultrasound earlier in your pregnancy to help determine your due date or check for problems with the baby's development.