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 first trimester prenatal schedule may not differ from that of a single pregnancy; however, you may discover that your healthcare provider wants to see you every two to three weeks. Once you enter into your second trimester, you should expect to have two prenatal visits per month. During the third trimester you should anticipate weekly prenatal appointments. Your healthcare provider may change the amount of appointments based on the health of you and your babies.