1. urinary infection can affect the pregnancy
by causing uterine action due to inflammatory reaction and fever
in case of severe infection if can spread to upper urinary tract
etc which can affect the general health of the mother and growth of the baby,
but don't worry with early detection and proper care these can be prevented.
2.normally full term gestational age
is calculated as 9 completed months and 7 days means 40 weeks,
so you can wait till that, if she doesn't get pains by that time you consult gynecologist and once take regular check up if everything is normal you can wait for one more week, by that time she may get pains, if not you can go for induction,