None! A retroverted uterus is one that's tilted towards your back, rather than your abdomen; it occurs in 20% of women and does not have symptoms, RARELY associated with discomfort. It can't be prevented and there's no need to treat b/c it won't affect your fertility/ability to continue a pregnancy/have a vaginal delivery. It can only be a problem if caused by past surgeries/endometriosis, otherwise OK.
None. You should have no unusuall effects.
Uterine position. The position of your uterus won't affect your feeling pregnant. Unless you have another problem contributing to your difficulty, the position of your uterus should not affect your ability to get pregnant.