Missed abortion . The fetus dies in the uterus but doesn't come out. You may not have symptoms for quite some time. In this situation, all of your pregnancy symptoms will gradually disappear, and you obviously won't progress at all. This condition is frequently diagnosed during a routine exam, and the fetal heartbeat can no longer be heard.
Treatment depends on the duration of the pregnancy.
Again, the risk of miscarriage increases with age. This means that a significant portion of thirty something pregnancies will end this way. There are all kinds of reasons why you might be miscarrying, but most women who miscarry either once or twice do go on to have normal pregnancies and deliveries. The odds of having a miscarriage tend to increase exponentially with each recurrent miscarriage. Because of this, it's important to STOP trying after two consecutive miscarriages to be evaluated for factors causing pregnancy loss.