No reason was ever given for what caused my own miscarriage and unfortunately this often seems to be the case. It is a natural reaction to ask "why" and it adds to the trauma of the loss when there are no answers to be had.
I am certainly no expert in 'causes of miscarriage' but i have listed here interesting bits and peices i have found and also some very informative links.
My doctor told me that the odds of miscarriage are one in four! Incredibly high i thought. Ive since read that (according to some sources) they can be even higher.
The first 12 weeks (first trimester) are the 'highest risk' period when most miscarriages occur. Sometimes things go wrong virtually from the moment of conception and the egg does not divide properly. This is often termed a 'blighted ovum'. Chromosome abnormalities are also a common cause ..where for instance part of one chromosome 'sticks' to a different pair.Or the egg may fail to implant properly in the uterus wall. Abnormalites and deformities may have no cause which the parents could have prevented - they happen for no known reason.

However there are things which parents can do to lessen the risks... (Oh and By the way, according to an interesting article "LIFE BEFORE BIRTH" 'Researchers found that half of all miscarriages can be attributed to the male partner'.#Australian study at the university of Adelaide and Queen Elizabeth Hospital genetics dept *Article in Australian Parents/pregnancy) Research has found that the dangers of some medications and other substances ( including alcohol and nicotine) not only affect the baby through the mother but also by affecting the sperm cells of the father -which could produce deformities in the children ( or cause miscarriage)
In conclusion it was stated that potential for miscarriage increased where the male and/or female were regularly exposed to oil-based paints,glues and oven cleaners. Unprotected x-rays for lower back pain (particularly for men) also increased the risk of miscarriage)
Another interesting recent finding which i came across on the 'net recently linked recurrant miscarriage to PCOS ( a disorder in the woman which causes cystic ovaries, weight gain,irregular periods ,infertility...but try HERE for more information on this!
Other causes can be an incompetant cervix ( basically dilates too early and needs a stitch to hold it shut until delivery date) or rarely deformities of the uterus itself.
As ive mentioned I am no expert so I have a few very good links here which will help more than i can at this stage :-)
I will be adding to this page and links list as I come across more info.

http://hygeia.org/learn.menu.htm(Highly recommended for 'causes')
http://www.parentsplace.com/pregnancy/loss/ (A good 'general info' site and also answers questions)
'Floor plan' of the East Wing;

Room 1

What Not
to say!'
Room 3



Room 9

Room 11


'East wing'

Room 2

How does
it feel?'
Room 4

What to
Room 6

Causes of
Room 8

Submit a
Room 10

Room 12

East wing
The above floor plan of the 'East wing will make it easier to find your way around. (You are currently in ROOM 6.)
For first time visitors with no experience of miscarriage;Welcome and thank you for visiting.I urge you to please start with ROOM 1!
Also please take a look at ROOM 2which considers how the parents are feeling.. And of course ROOM 4what TO say!
If you have had a miscarriage and are looking for specific help/information .. Firstly i am sorry for your loss, you could try ROOM 3 which suggests a few things to do which help with the grieving process.
If you are feeling things are hard to cope with..maybe ROOM 5 which lets you know you are not alone with your emotions and sometimes extreme feelings after a loss.
Naturally there is always the question 'Why?'.Often this simply cannot be answered but in ROOM 6 (you are here)there are listed some causes of miscarriage.
ROOM 7and ROOM 9 are 'public' memorial rooms where parents have left touching tributes to their own babies.You can view these and if you wish to leave one of your own ..go to ROOM 8to submit a memorial using the blank form there.
ROOM 10 is my personal tribute to our 'Sweetpea',story and memorial.
ROOM 11 is the links library - listing helpful links to other memorial sites and miscarriage help information resources.
ROOM 12 Is a special link page for people who kindly use my banner and link to 'East wing..to display their banner ( or have their site listed) Your site does not have to deal with miscarriage related topics to be listed here.

Stunning graphics on this page