BMJ 2007;335:1174 (8 December).
News, In brief:
A study involving 92 671 pregnant women showed that the risk of miscarriage in the first 18 weeks was higher among women who exercised more than seven hours a week than among those who did not exercise (hazard ratio 3.7 (95% confidence interval 2.9 to 4.7)) (BJOG 2007;114:1419-26).
