One dioxin exposure in the womb affects female fertility in mice for generations.

One dioxin exposure in the womb affects female fertility in mice for generations.
http://www.environmentalhealthnews.org/ehs/newscience/prenatal-dioxin-affects-female-mouse-fertility-for-generations/ 
 
"Females exposed to dioxin while developing in the womb could have difficulty getting pregnant – and so could their daughters and their granddaughters. A study with mice finds the reproductive health effects of dioxin last for generations, reducing fertility and increasing the chances of premature delivery. The results support findings from prior animal and human studies that show dioxin can affect fertility, especially if exposures occur at key times of life. This study further shows subsequent generations are at risk, especially from preterm birth, a growing problem for women around the world. Because humans are regularly exposed to low levels of dioxins, these results suggest the chemical could affect women's fertility – and the fertility of their children and grandchildren."