Hi and welcome to HCM.
There is a risk,but having irregular periods
doenst mean that she cant get pregnant. Women with PCOS have normal pregnancies and kids but it have to be well treated and under control so I suggest frequent gyn examinations including hormonal
check ups and ovarian ultrasound
. Nothing can be known till she get married and starts having frequent sexuall intercourses. If she would have fertility
difficulties she can benefit from IVF or medicaly stimulated ovulations.
WIsh you good health.