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Can sex boost the odds of IVF success?

NCT ID NCT04880590

Knowledge-focused Sponsor: Fundación Santiago Dexeus Font Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early This study
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 08, 2026 · Last updated Sep 09, 2026 · Updated 1 time

Summary

This trial asks whether having sexual intercourse in the 72 hours after a frozen embryo transfer changes the likelihood of a clinical pregnancy. Researchers will compare pregnancy rates, miscarriage rates, and live birth rates between women who have sex and those who do not. The study includes women in heterosexual relationships undergoing a frozen embryo transfer cycle.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Coital sexual intercourse
What this could lead to
If sex after embryo transfer improves pregnancy rates, couples could gain a simple, natural way to boost their chances during fertility treatment.
What could go wrong
This is a single study, and results may not apply to all fertility patients. Also, the trial does not account for other factors that could influence pregnancy, so any link found might not be cause and effect.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

412 people

The number who actually took part.

Started

May 2021

Finished

Apr 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

-After detailed oral and written information on the nature of the study, patients who meet the inclusion criteria will give their written consent. According to this consent, patients agree to have their data used and analyzed for the present study.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Women with a heterosexual sexual relationship * That they carry out an embryo transfer, in a FET cycle Exclusion Criteria: * Exclusion criteria are not foreseen

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Conditions

The condition(s) this trial relates to.

Coitus female infertility

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Infertility, female Sexual intercourse

Contacts and locations

Locations

  • Hospital Universitario Quiron Dexeus

    Barcelona, 08028, Spain

More trials for these conditions

Other studies related to the condition(s) this trial covers.