Cigarette smoke reduces the production of a Fallopian tube gene known as "BAD", which helps explain the link between smoking and ectopic pregnancy. The finding, from scientists led by Drs Andrew Horne and Colin Duncan at the Medical Research Council (MRC) Centre for Reproductive Health in Edinburgh, UK, was described at the annual meting of ESHRE (European Society of Human Reproduction and Embryology) in Istanbul.
He went on: "The research is exciting because it provides new scientific evidence to help understand why women who smoke are more likely to have ectopic pregnancies. It appears that smoking reduces the production of genes such as BAD which are involved in the control of cell death and promote an environment in the Fallopian tube which is attractive to the developing embryo.
Source: Medical News Today