In fact, one in four pregnancies end in miscarriage, usually before the twelfth week of pregnancy. Many women miscarry without having been aware that they were pregnant. Nevertheless, if you do suffer a miscarriage, no amount of reassurance that it is ‘normal’ or ‘common’ can ease the pain.nother possibility – and certainly the natural alternative – is to take vitamin E. This vitamin can help thin the blood and prevent clots. A study published in the Lancet found that taking a daily dose of vitamin E reduced the risk of having a heart attack by an astonishing 75 percent.