Hiya Anna Marie
Firstly may I offer my sincere sympathies for your heart breaking losses....No-one deserves to lose a baby, let a lone three.
For most miscarriages there is no known cause, however in some instances it may be due to either:-
Chromosomal problems
Illness in the mother
Hormone imbalance
Disorders of the immune system
Abnormalities of the uterus
Environmental and lifestyle factors
If you have had more than one miscarriage, each may have had a different cause. ....But each of the above possible causes will be investigated. Often, no cause will be found, as in my case....initially anyway!
I too suffered from 3 miscarriages and was subsequently reffered to a Repeat Pregnancy Loss (RPL) clinic. I had a scan to look for Uterine problems and blood tests done to see if I had clotting, immune or chromosomal abnormalities. My husband and I also had to have blood tests for Genetic screenin. At this time, all our test results came back as "Normal".
I concieved for the fourth time and began taking low dose Aspirin at 4wks, upon advice from my Consultant. MY RPL Consultant arranged for all my RPL bloods to be repeated at 6wks....This time one of my results was not normal. My Anticardiolipin Antibody levels came back raised. This is one of the Anti-Thrombiphlia antibodies which basically cause clotting problems in your blood. Specifically your blood clots too much. The result of this can be that the baby does not get an adequate blood supply and miscarriage can result......I asked why I would have a negative result upon the first batch of tests, only to get a positive result and was told that antibody levels can fluctuate. I think perhaps my antibody levels raise during pregnancy....My initial tests were performed 8 wks after my 3rd D&C after a missed miscarriage.
At 11wks I started Heparin injections (20mg), along with the Aspirin to thin my blood.....I am now 32weeks pregnant with no other problems.
I know the prospect of finding anything wrong is especially daunting, but for most conditions that cause miscarriages, there are medications you can take to prevent it ever happening again once pregnant.
I wish you the best of luck, really hope all your tests come back with the best possible outcome and you have a successful pregnancy very soon.
Don't ever give up....As long as you are able to get pregnant, you have done the hardest part....Now your in specialists hands they will do their upmost to keep you pregnant the next time you concieve.
Love