There are a lot of reasons why women have miscarriages. It can be because of a disease the woman has, infertility, issue, stress, biological concerns like the mother's age,but to identify each and everyone of them it will just be a little difficult.

I guess one main issue usually is when a has undiagnosed type 2 diabetes. Not all women realize that if you are diabetic there is a big chance you may miscarriage more than one time. The reason uncontrolled blood sugar can cause miscarriages.

Age makes a huge difference too. Genetically a younger egg (meaning a younger mother) may produce healthier and much viable eggs. Cells develop accordingly and less chances of acquiring genetic defects.

More importantly genetic problems are also considered. If your family has a history of miscarriages or fertility problems then it is possible you might have the same problems too.

To aviod miscarriages be on top of your health. Talk to your doctor.