---
title: Does iron level change during different phases of the menstrual cycle?
description: Yes. Iron levels are lower in the follicular phase before ovulation than in the luteal phase after ovulation. This was one school study, so it may not apply t
url: https://niyora.com/research/papers/haemoglobin-levels-impact-on-follicular-and-luteal-phases-among-school-girls-2025/
---

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- Does iron level change during different phases of the menstrual cycle?

Survey study, 2025

# Does iron level change during different phases of the menstrual cycle?

Yes. Iron levels are lower in the follicular phase before ovulation than in the luteal phase after ovulation. This was one school study, so it may not apply to all girls.

 Early or limited evidence

School girls at one school in West Bengal, India

## What they did

Researchers measured haemoglobin levels (a sign of iron) in school girls during two phases of their menstrual cycle: the follicular phase before ovulation and the luteal phase after ovulation.

## What they found

Haemoglobin was 10.80 gm/dL in the follicular phase and 11.98 gm/dL in the luteal phase.

## What it means for you

Your iron levels naturally vary during your cycle, being lower before ovulation. Low iron can affect concentration, energy and physical strength. The study only looked at girls from one school in India, so these findings may not apply everywhere.

10.80

haemoglobin in follicular phase (gm/dL)

11.98

haemoglobin in luteal phase (gm/dL)

## About the study

Original title Haemoglobin Levels: Impact on Follicular and Luteal Phases Among School Girls Authors Aparna Sadhu, Dipsikha Manna, Sarmishtha Chatterjee Journal International Journal of Health Sciences and Research Year 2025 Study design Survey study What was tested Measurement only - no intervention tested Open access Yes Read the paper [doi.org/10.52403/ijhsr.20250107](https://doi.org/10.52403/ijhsr.20250107)

## Topics

[Premenstrual syndrome (PMS)](https://niyora.com/research/topics/condition-pms/)[Menstrual cycle and mood](https://niyora.com/research/topics/condition-cycle-mood/)[Zinc and iron](https://niyora.com/research/topics/treatment-zinc-iron/)[Work and productivity](https://niyora.com/research/topics/life-area-work/)[Students and academic performance](https://niyora.com/research/topics/life-area-education/)[Adolescents and young people](https://niyora.com/research/topics/life-area-adolescents/)

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