--- title: Do menstrual symptoms or PMDD affect how much insulin women with type 1 diabetes need? description: No. Women with type 1 diabetes need more insulin during their luteal phase (the week before their period), but this happens regardless of whether they have me url: https://niyora.com/research/papers/1066-or-menstrual-cyclerelated-insulin-requirement-changes-are-independent-of-2026/ --- - [Niyora](https://niyora.com/) - [Research](https://niyora.com/research/) - [Library](https://niyora.com/research/library/) - Do menstrual symptoms or PMDD affect how much insulin women with type 1 diabetes need? Survey study, 2026 # Do menstrual symptoms or PMDD affect how much insulin women with type 1 diabetes need? No. Women with type 1 diabetes need more insulin during their luteal phase (the week before their period), but this happens regardless of whether they have menstrual symptoms or PMDD. Moderate study design 15 premenopausal women with type 1 diabetes not using hormonal birth control ## What they did 15 women with type 1 diabetes using an insulin pump were monitored across their menstrual cycle. Using data from 80 cycles, researchers compared insulin use during the follicular phase (days 1-7) to the luteal phase (days -7 to -1 before period). They checked if menstrual symptoms or PMDD explained any of the differences. ## What they found Women used 49.2 units of insulin daily during the luteal phase versus 45.1 units during the follicular phase. More insulin was needed for basal (background) insulin during the luteal phase. Blood sugar control was slightly worse in the luteal phase. These differences remained after accounting for how much carbohydrate they ate. Menstrual symptoms and PMDD scores were not associated with these insulin changes. ## What it means for you Hormone changes in the luteal phase increase insulin resistance in women with type 1 diabetes independent of whether they have PMS or PMDD symptoms. This is a small study, but it suggests the effect is biological not psychological. The findings might help improve insulin pump programming for women. 15 women with type 1 diabetes 80 menstrual cycles analyzed 49.2 vs 45.1 daily insulin units in luteal vs follicular phase ## About the study Original title 1066-OR: Menstrual Cycle–Related Insulin Requirement Changes Are Independent of Menstrual Symptoms and PMDD in Women with Type 1 Diabetes Using an AHCL System Authors Eri Takagi, Hideyoshi Kaga, Ryoki Mori et al. Journal Diabetes Year 2026 Study design Survey study What was tested monitoring during natural menstrual cycles Read the paper [doi.org/10.2337/db26-1066-or](https://doi.org/10.2337/db26-1066-or) ## Topics [Premenstrual dysphoric disorder (PMDD)](https://niyora.com/research/topics/condition-pmdd/)[Diet and nutrition](https://niyora.com/research/topics/treatment-diet/) Research tells you what helps on average. Niyora helps on the day it hits. Calm down, see it another way, and decide what to say, with a PMS and PMDD app built by a doctor. ## Related studies Systematic review, 2025 Do nutritional interventions help with emotional symptoms of PMS? Systematic review, 2025 How common are PMS, PMDD, and painful periods in nursing students, and do they affect their schooling? Review, 2001 What causes PMS and PMDD, and how are they treated? Review, 2001 What are PMS and PMDD, and how are they treated? Survey study, 2026 Does eating a Mediterranean diet reduce premenstrual symptoms? Survey study, 2023 What factors make some women more likely to have PMS or PMDD? Ask AI about this page Copy prompt ChatGPT ↗ Claude ↗ Perplexity ↗ Google AI Mode ↗ Grok ↗