---
title: Can a portable device accurately measure blood oxygen levels across the menstrual cycle?
description: A portable device called Astrim can reliably measure blood oxygen levels using near-infrared light. Body temperature and hormone levels measured in urine incr
url: https://niyora.com/research/papers/applicability-of-a-portable-non-invasive-device-evaluating-hemoglobin-and-2004/
---

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- Can a portable device accurately measure blood oxygen levels across the menstrual cycle?

Lab study, 2004

# Can a portable device accurately measure blood oxygen levels across the menstrual cycle?

A portable device called Astrim can reliably measure blood oxygen levels using near-infrared light. Body temperature and hormone levels measured in urine increased in the premenstrual phase.

 Early or limited evidence

25 young healthy women, average age 20.4 years

## What they did

Twenty-five young women not on medications participated. A portable device measured blood oxygen using near-infrared light during the follicular and late luteal phases across three cycles. Measurements were taken after overnight fasting. Women recorded daily physical and emotional symptoms.

## What they found

Oral temperature and hormone levels measured in urine significantly increased during the late luteal phase (before menstruation). The device measurements of blood oxygen levels were reliable and repeatable.

## What it means for you

The study showed this portable device can reliably measure blood oxygen levels across the menstrual cycle using near-infrared light. This was a small study in young healthy women not on medications, so the findings may not apply to older women or those with health conditions.

25

women in study

3

menstrual cycles studied

20.4

average age in years

## About the study

Original title Applicability of a Portable Non-Invasive Device Evaluating Hemoglobin and Peripheral Circulative Function in Eumenorrheic Young Women with Premenstrual Discomfort Authors Tamaki Matsumoto, Noriyuki Tatsumi Journal Blood Year 2004 Study design Lab study What was tested Measurement using a portable infrared device Read the paper [doi.org/10.1182/blood.v104.11.3678.3678](https://doi.org/10.1182/blood.v104.11.3678.3678)

## Topics

[Menstrual cycle and mood](https://niyora.com/research/topics/condition-cycle-mood/)[Adolescents and young people](https://niyora.com/research/topics/life-area-adolescents/)

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