Join the MILK study. MILK is a research study looking at the effects of a new, medicated vaginal ring on breastfeeding mothers and breast milk. If enrolled, you will be required to wear the ring for a period of 2 weeks and provide multiple breast milk samples. You must be at least 6 weeks postpartum to be eligible. Physical exams, GYN exams, and HIV/STI testing will be provided at no cost, and you will be compensated $525 for your time. For more information, call (205) 996-4405.