Girls seem to follow the footsteps of their elder sisters, especially if they had children during their teens.
Those with elder sisters who had children during their teenage years carried a two-fold risk of teen pregnancy. Education is the only way to reduce rate of teenage pregnancy.
"Previous research has shown that family background and raising the education of girls decreases the chances of teenage pregnancy. However, these findings reveal the positive sibling effect (on conception rates) still dwarfs the negative effect of education. These findings provide strong evidence that the contagious effect of teen motherhood in siblings is larger than the general effect of being better educated," researchers said.