About 15% of all recognized pregnancies end in miscarriage. Some estimate that at least 50-60% of all pregnancies will end in early pregnancy loss, as most losses occur before the woman even realises that she is pregnant.
Miscarriage is usually a one time occurance for most couples. Approximately 98-99% of couples who experience a miscarriage are able to go on to have a healthy subsequent pregnancy. Approximately 1-2% of couples will go on to have multiple miscarriages in a row.
Women over the age of 35 are statistically more likely to miscarry due to the breakdown of chromosonal materials in the mother's egg with age.
Relative risk of miscarriage in different age groups in recognised pregnancies:
20's - 10%
35-39 - 20%
40-44 - 50%
Please try to remember that statistics, although useful, do not decide your fate either way. Each woman is completely different as is each pregnancy, and it cannot be predicted who will miscarry and who will not based solely on age.