There are some natural things that occur during pregnancy that can help promote future conception. When the uterus grows in your first pregnancy, it helps tear away scar tissues in the fallopian-tubes that keep eggs from entering the tubes which helps out in the future. Also, pregnancy keeps hormones that contribute to infertility inhibited. This is not always the case, some couples experience a secondary infertility. Stress often affects conception, so remember to stay optimistic!