Research brief: Smoking linked to infertile uterus

Heavy smoking may reduce female fertility by making the uterus less receptive to embryo implanting, say fertility experts in Portugal and Spain. A study of 785 women undergoing oocyte-donated IVF showed that 34 per cent of women who smoked over 10 cigarettes a day became pregnant, compared with 52 per cent of those who smoked less then 10 cigarettes a day (Human Reproduction Online).