◐ Luteal phase
Luteal Phase Calorie Calculator
During the luteal phase (post-ovulation, pre-period), progesterone raises core body temperature and BMR by about 150 kcal per day. The luteal phase calorie calculator above adds the adjustment automatically so your daily target matches what your body actually burns this week.
During the luteal phase of the menstrual cycle (roughly days 15–28 of a 28-day cycle), progesterone raises body temperature and basal metabolic rate by an average of 150 kcal per day. The luteal phase calorie calculator applies this +150 kcal/day adjustment when "luteal phase" is selected. Primary sources: Reed et al., Eur J Clin Nutr 1988;42(7):615-623 (PMID 3416824), and Henry et al., Br J Nutr 2003;89(6):811-817.
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Luteal phase · Pregnancy (T1/T2/T3) · Breastfeeding · Perimenopause · PCOS
After ovulation, progesterone raises your BMR by about 150 kcal/day for the two weeks before your period. That hunger is real. Eating at the adjusted target during luteal days keeps your weekly average on track without triggering a binge at day 25.
What is happening physiologically
After ovulation, progesterone rises sharply. Progesterone raises core body temperature by about 0.5 F (0.3 C), and that extra thermal work costs calories. The luteal-phase BMR bump averages 150 kcal/day, with individual ranges of 75–250 kcal/day reported across studies (Reed et al., 1988; Henry et al., 2003).
When the luteal phase starts and ends
- Standard 28-day cycle: luteal phase runs days 15–28.
- Longer cycle: luteal phase still lasts about 14 days. Only the follicular phase varies.
- Marker: a sustained rise of about 0.5 F in basal body temperature signals that ovulation has occurred and the luteal phase has begun.
Why this matters in practice
- Stronger appetite during luteal phase is your body asking for the extra 150 kcal, not a willpower failure.
- "Cycle-phase calorie cycling" works for some women: maintain in follicular, eat slightly higher in luteal, with weekly average unchanged.
- If you are weight-tracking, expect 1–3 lb of luteal water weight. It is not fat gain.
- Diagnostic checks for stalled fat loss should treat luteal weeks at maintenance, not at deficit -- see why am I not losing weight.
What to do next
- Run the calculator with "luteal phase" selected for the two weeks after ovulation.
- Eat at the higher target during luteal days. You will be hungrier; honor it.
- Drop back to your standard maintenance calories during the follicular phase.
- If you weigh daily, expect 1–3 lb of luteal water retention. Use a 7-day moving average for trend, not the daily number.
Sources
- Reed SC, Levin FR, Evans SM. Changes in mood, cognitive performance and appetite in the late luteal and follicular phases of the menstrual cycle. Eur J Clin Nutr. 1988;42(7):615-623. PMID 3416824.
- Henry CJ, Lightowler HJ, Marchini J. Intra-individual variation in resting metabolic rate during the menstrual cycle. Br J Nutr. 2003;89(6):811-817.
- Wurtman RJ, Wurtman JJ. Brain serotonin, carbohydrate-craving, obesity and depression. Obes Res. 1995;3 Suppl 4:477S-480S. Luteal-phase carbohydrate craving mechanism.