The normal luteal phase length is from 10 to 16 days. If you notice over a few cycles (with clear ovulation patterns on your charts and accurate data collection methods) that your luteal phase is less than 10 days, then this is something to mention to your doctor who will be able to help you. If you have several cycles with well-timed intercourse during your fertile period, and a luteal phase on the short side of normal (10 or 11 days) then you may also consider bringing this up with your doctor who will be able to help you determine whether or not this could be an issue for you.
Video Chart Interpretation: Short Luteal Phase, Out of place temperature and breastfeeding.
Video Chart (on Youtube)
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