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The effect of vitamin D and synbiotics consumption on sexual function and sexual self-expression in lactating women

Evaluation the effect of combination use of synbiotics and vitamin D compared to their separate use on sexual function and sexual self-expression in lactating women: A randomized double blind clinical trial

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
IRCT
Registry ID
IRCT20250207064679N1
Enrollment
112
Registered
2025-09-19
Start date
2025-11-21
Completion date
Unknown
Last updated
2025-10-13

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

Conditions

Condition 1: sexual function. Condition 2: sexual self-expression.

Interventions

Intervention 1: First intervention group: receiving vitamin D supplement (one capsule of 1000 international units, made in Iran or imported, depending on availability and approval by the Food and Drug

Sponsors

Yasouj University of Medical Sciences
Lead Sponsor

Eligibility

Sex/Gender
Female
Age
18 Years to 40 Years

Inclusion criteria

Inclusion criteria: - Age between 18 and 40 years - At least 1 month has passed since the start of sexual intercourse and a maximum of 4 months after childbirth (before the start of complementary feeding) - Active and exclusive breastfeeding - Having sex at least once a month - No history of chronic diseases (diabetes, thyroid, epilepsy, etc.) - No use of hormonal or antidepressant medications in the past 3 months - Consent to participate in the study and completion of the informed consent form

Exclusion criteria

Exclusion criteria: - Allergy to prescribed supplements - Taking medications that affect sexual function and self-expression, such as blood pressure reducers, antihistamines, H2 blockers, barbiturates - Taking birth control pills - Taking supplements containing synbiotics, probiotics, or vitamin D (except for the usual doses of pregnancy supplements if taken continuously during pregnancy and no more) for at least 4-6 weeks prior - Taking any new medications that affect mood or sexual function

Design outcomes

Primary

MeasureTime frame
Sexual function of lactating women. Timepoint: At the beginning of the study and 8 weeks after starting the supplements. Method of measurement: The Female Sexual Function Index (FSFI) questionnaire.;Sexual self-expression of lactating women. Timepoint: At the beginning of the study and 8 weeks after starting the supplements. Method of measurement: Hulbert Index of Sexual Assertiveness questionnaire.

Countries

Iran (Islamic Republic of)

Contacts

Public ContactMaryam Naeemi

Yasouj University of Medical Sciences

matyam99774411@gmail.com+98 74 3322 1308

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026