You may start to notice symptoms of PCOS in your late teens or 20s, e. g absent or irregular periods; infertility-you need to ovulate to become pregnant and you may not be ovulating regularly or at all; obesity or being overweight; excess hair (hirsutism) on your face, around your nipples or on your lower abdomen; thinning of the hair on top of your head or development of acne.
Attribution: BUPA