The goals of that submission will be to conduct a clinical trial of n-3 long-chain polyunsaturated fatty acids (LCPUFAs) to prevent smoking relapse in post-partum women who quit smoking during pregnancy. For this proposal, the investigators will develop, test, and refine our recruitment strategy, and collect data demonstrating our ability to successfully recruit post-partum women who are former smokers. The investigators will collect side effect, tolerability, and adherence data regarding our intervention. Finally, the investigators hope to gather preliminary effect size data to allow more formal estimated of sample size. The investigators hypothesize those post-partum former smokers randomized to n-3 LCPUFA supplementation will be less likely to relapse and have less nicotine cravings compared to women allocated to placebo. As a secondary analysis the investigators will compare the differences in smoking point prevalence at 6 and 12 weeks between n-3 LCPUFA and placebo. The investigators intend to use this preliminary data to inform a future randomized, double-blind, placebo-controlled trial of n-3 LCPUFA supplementation to prevent smoking relapse in post-partum women.