Why do tobacco smokers have a greater risk of an ectopic pregnancy?

Tobacco smokers have a greater risk of ectopic pregnancy due to the harmful effects of nicotine and other chemicals in cigarettes, which can impair the function of the fallopian tubes. Smoking can lead to inflammation and scarring in the reproductive organs, making it more difficult for an embryo to travel to the uterus. Additionally, smoking may disrupt hormonal balance and affect overall fertility, further increasing the risk of ectopic pregnancies.