Risk factors include the following:
Medications- some medications alter the chance of women to ovulate. This can also alter the hormonal processes in a woman's body
Age- women of older age has less chance of conceiving. The egg's quantity and quality declines as the woman age
Weight- being overweight may affect hormone production and prevent ovulation
Alcohol- having more than one alcoholic drink per day increases the chande of ovulation disorder
Tobacco- Smoking can damage the quality of egg cell and can lead to infertility. This can also lead to problems during pregnancy.