A “certification period” is the length of time a WIC participant is eligible to receive benefits. The length of the certification may vary depending on whether the individual is pregnant, postpartum, breastfeeding, an infant or child. The certification period most often ranges from 6 months to 1 year. At the end of that time period, the individual must reapply in order to be determined eligible for another certification period unless they are now by definition ineligible; for example, a child who has turned 5 years old, or a woman no longer postpartum or breastfeeding. After you have been determined eligible you will typically have a WIC appointment every 1-3 months.