Proceive Pregnancy Trimester 3 (60). Proceive Pregnancy Trimester 3 offers tailored nutrition for both you and your baby during the final 12 weeks of pregnancy.. Key Nutrients For Weeks 28-40 of pregnancy. Comprehensive formula of 28 Vitamins and Minerals. Tailored for the Third Trimester. Suitable for vegans. This is a comprehensive, active blend of 28 vitamins, minerals and amino acids scientifically formulated for this stage.