Yes, maternity activewear can still be worn after giving birth. In the early postpartum period, your body will still be adjusting, and maternity activewear can provide comfort and support during this time. The stretchy fabrics and adjustable features of maternity activewear make it suitable for use during the postpartum period as well. However, as your body continues to change, you may eventually transition to regular activewear or other comfortable clothing options.