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Reproductive Health and Your Menstruation: an observational study looking at endometrial ageing in menstrual fluid.

An observational study exploring circRNAs and key hallmarks of endometrial ageing in menstrual fluid from women of different reproductive ages and/or with polycystic ovary syndrome (PCOS).

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ANZCTR
Registry ID
ACTRN12625000819426
Acronym
RHYM
Enrollment
0
Registered
2025-07-31
Start date
2025-08-04
Completion date
2025-08-29
Last updated
2025-09-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

This project aims to understand how certain factors like age and PCOS impact the endometrium by using menstrual fluid. Like all tissues in the body, the endometrium also changes over time. In Australia, more women are getting pregnant for the first time later in life. However, as we age, fertility naturally declines and the endometrium changes as well. As the endometrium plays a key role in pregnancy, we want to understand how aging affects it and the impacts this may have. Similarly, people who have been diagnosed with PCOS, typically have longer, irregular menstrual cycles. We think this could impact the endometrium in a similar way to aging. We will assess markers of ageing in endometrial cells isolated from menstrual fluid. This research is important because if the endometrium isn’t functioning properly, it can impact fertility, regular menstruation and reproductive health overall.

Interventions

This pilot study will explore endometrial health using menstrual fluid and how it may differ between women of different age and reproductive health. A minimum of 30 women will be recruited for this study who are of different ages, have healthy menstrual cycles or have a reproductive condition, Polycystic Ovary Syndrome (PCOS). Group 1 are 18-25 within reproductive age with typical menstrual cycles. Group 2 are 35-43 within reproductive age with typical menstrual cycles. Group 3 will be with vari

This pilot study will explore endometrial health using menstrual fluid and how it may differ between women of different age and reproductive health. A minimum of 30 women will be recruited for this study who are of different ages, have healthy menstrual cycles or have a reproductive condition, Polycystic Ovary Syndrome (PCOS). Group 1 are 18-25 within reproductive age with typical menstrual cycles. Group 2 are 35-43 within reproductive age with typical menstrual cycles. Group 3 will be with varied reproductive age and have a self-reported diagnosis of PCOS. Menstrual fluid samples will be self collected once only on day 2 of menses for 4-6 hours. Peripheral blood will be taken once only on the day before the next predicted period begins. Participation is for one menstrual cycle only. Data generated will be used for a power analysis for a future study.

Sponsors

Flinders University
Lead SponsorUniversity

Eligibility

Sex/Gender
All
Age
18 Years to 43 Years
Healthy volunteers
Yes

Inclusion criteria

Group 1: Individuals who are assigned female at birth 18-25 years who have typical menstrual cycles Willing to complete questionnaires and use a menstrual cup to collect their own menstrual fluid Group 2: Individuals who are assigned female at birth 35-43 years who have typical menstrual cycles Willing to complete questionnaires and use a menstrual cup to collect their own menstrual fluid Group 3: Individuals who are assigned female at birth 18-43 years who have been diagnosed with PCOS Willing to complete questionnaires and use a menstrual cup to collect their own menstrual fluid

Exclusion criteria

Participants will be excluded if they: (i) Are on any hormonal contraception/therapy (ii) Have severe chronic pelvic pain (iii) Have other reproductive disorders (excluding PCOS) (iv) Have a history of infertility (excluding PCOS group) (v) Have a sexually transmitted infection (vi) Have been taught by one of our researchers in the past 12 months.

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026