Although the reasons behind miscarriage are still vague, the researchers did establish some other common risk factors. The study found that single women were at an increased risk of miscarriage, as were women who had had a previous abortion (60% higher risk) and those who had had IVF (40% higher risk). Those who took more than a year to conceive were twice as likely to miscarry as women who had conceived within the first three months.
The researchers also revealed factors in maintaining a healthy pregnancy. Two-thirds of the women they studied who took vitamin supplements during early pregnancy reduced their risk of miscarriage by around 50%. The effect was most pronounced among those taking folic acid or iron and multivitamins containing these. Eating fresh fruit, vegetables and chocolate daily was also found to halve the odds of a miscarriage.
The study also showed that
Women who suffered from nausea and sickness in the first 12 weeks of their pregnancy were almost 70% less likely to miscarry, especially those with severe sickness.
Interestingly, and somewhat reassuringly:
Supposed risk factors such as alcohol consumption, smoking and caffeine intake were unconfirmed in the study.