How Do I Lengthen My Menstrual Cycle?

How Do I Lengthen My Menstrual Cycle? Vitamin B6 is also known for its fertility-enhancing properties and is especially effective in lengthening the luteal phase. The daily dose should not exceed 50 mg. Essential fatty acid Omega 3 can boost progesterone production and promote a healthy luteal phase. Does vitamin B6 make your cycle longer?