Research has long shown that toxins in cigarettes can damage a woman’s eggs, harming her fertility. But a newly study suggests that these toxins make it difficult for an embryo to implant in the uterus.
The study monitored heavy smokers as well as light smokers and non-smokers, all of whom were undergoing into-vitro fertilization with donated eggs. The light and non-smokers had a higher pregnancy rate (52 percent) that the heavy smokers did (34 percent) over the same time period. Because all the women used donor eggs, researchers think the ity to receive an embryo rather than with eggs or ovaries