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Letrozole vs. Clomiphene Citrate Plus Tamoxifen for Ovulation Induction and Pregnancy Outcomes. (LET-CC-TAM)

28. maj 2026 opdateret af: Ghada Abdullatef Mahmood Al-Rajami, Sana'a University

Letrozole Versus Clomiphene Citrate Plus Tamoxifen for Ovulation Induction and Pregnancy Outcomes in Infertile Women: A Randomized Clinical Trial

Infertility is a common reproductive health problem. Ovulation induction is a key treatment for women with anovulatory infertility. Letrozole and clomiphene citrate are widely used medications for ovulation induction. Tamoxifen has also been used as an alternative or adjunct therapy.

This randomized clinical trial aims to compare the effectiveness of letrozole versus clomiphene citrate combined with tamoxifen for ovulation induction and pregnancy outcomes in infertile women. The outcomes include ovulation rate, pregnancy rate, endometrial thickness, follicular development, Miscarriage rate, and Live birth rate.

The study will be conducted at Al-Thawra Hospital in Sana'a, Yemen, under the supervision of Sana'a University.

Keywords: Infertility, Ovulation Induction, Letrozole, Clomiphene Citrate, Tamoxifen

Studieoversigt

Status

Aktiv, ikke rekrutterende

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Infertility affects a significant proportion of women worldwide and is often associated with ovulatory dysfunction. While letrozole and clomiphene citrate are standard treatments for ovulation induction, their comparative effectiveness alongside tamoxifen as adjunct therapy remains under investigation.

Infertility affects a significant proportion of women worldwide and is often associated with ovulatory dysfunction. While letrozole and clomiphene citrate are standard treatments for ovulation induction, their comparative effectiveness alongside tamoxifen as adjunct therapy remains under investigation.

This study is a randomized clinical trial enrolling women with anovulatory infertility. Participants will be assigned to receive either letrozole alone or clomiphene citrate combined with tamoxifen. Ovulation will be monitored using ultrasound and hormonal assays. Pregnancy outcomes will be recorded and analyzed to compare efficacy between the two treatment groups.

Endometrial thickness and follicular development will be evaluated throughout the treatment cycles. All participants provide informed consent before enrollment, and the study is conducted under the approval of the Sana'a University Ethics Committee at Al-Thawra Hospital, Sana'a, Yemen.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

240

Fase

  • Fase 3

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Yemen
    • Sana'a
      • Sanaa, Sana'a, Yemen
        • Al-Thawra Hospital

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Women aged between 18 and 40 years.
  • Patients with anovulatory polycystic ovaries.
  • Presence of a normal uterus and patent fallopian tubes, as confirmed by hysterosalpingography (HSG).
  • Husband's semen analysis within normal parameters.
  • Normal serum prolactin and thyroid-stimulating hormone (TSH) levels.

Exclusion Criteria:

  • Spontaneous pregnancy.
  • Women with hyperprolactinemia or thyroid dysfunction.
  • Active liver disease or renal disease.
  • Documented pelvic diseases such as endometriosis, ovarian pathology, hydro- or pyosalpinx, or uterine fibroids.
  • Previous history of ovarian drilling.
  • Contraindications to letrozole, clomiphene citrate, or tamoxifen.
  • History of hypersensitivity reactions to study medications.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Letrazole Group
Participants receive letrazole for ovulation induction according to the study protocol and are followed to evaluate ovulation and pregnancy outcomes.
Medicin: Letrozole
Letrozole was administered for ovulation induction in infertile women according to the study protocol.
Eksperimentel: Clomiphene Citrate + Tamoxifen
Participants receive Clomiphene citrate and tamoxifen for ovulatory induction according to the study protocol and are followed to assess ovulatory and pregnancy outcomes.
Medicin: Clomiphene Citrate + Tamoxifen
Clomiphene citrate combined with tamoxifen was administered for ovulation induction in infertile women according to the study protocol.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Ovulation rate
Tidsramme: During three treatment cycles, from days 10 to 16 of each cycle, adjustments will be made based on individual variations in menstrual cycle length (cycle length: 21-35 days).
The primary outcome is the rate of ovulation among participants, assessed by ultrasound monitoring of follicular development and serum hormone levels.
During three treatment cycles, from days 10 to 16 of each cycle, adjustments will be made based on individual variations in menstrual cycle length (cycle length: 21-35 days).

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
clinical pregnancy rate .
Tidsramme: Pregnancy was confirmed in three treatment cycles (cycle length 21-35 days) through serum beta-hCG testing two weeks post-ovulation, followed by a transvaginal ultrasound showing a gestational sac four to six weeks later.
presence of a clinical pregnancy confirmed by transvaginal ultrasound visualization of a gestational sac with fetal heartbeat after ovulation induction treatment.
Pregnancy was confirmed in three treatment cycles (cycle length 21-35 days) through serum beta-hCG testing two weeks post-ovulation, followed by a transvaginal ultrasound showing a gestational sac four to six weeks later.
Endometrial thickness
Tidsramme: During each of the three treatment cycles, from cycle day 10 until the administration of the ovulation trigger, adjustments were made based on individual variations in menstrual cycle length(21-35 days).
Measurement of Endometrial thickness in millimeters using transvaginal ultrasound on the day of ovulation trigger during ovulation induction treatment cycles.
During each of the three treatment cycles, from cycle day 10 until the administration of the ovulation trigger, adjustments were made based on individual variations in menstrual cycle length(21-35 days).
Adverse Events/ Side effect
Tidsramme: From day 2 of the menstrual cycle (initiation of ovulation induction treatment) through up to 3 treatment cycles (cycle length: 21-35 days), until 2 weeks after the ovulation trigger.
Incidence of adverse events (CTCAE v5.0 grades 1-3 ), including nausea, headache, hot flushes, and ovarian hyperstimulation syndrome ( OHSS), was assessed by patient questionnaire per ovulation induction cycles.
From day 2 of the menstrual cycle (initiation of ovulation induction treatment) through up to 3 treatment cycles (cycle length: 21-35 days), until 2 weeks after the ovulation trigger.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Sana'a University

Samarbejdspartnere

Al-Thawra Modern General Hospital

Efterforskere

  • Ledende efterforsker: Ghada Abdullatef Al-Rajami, MD, Sana'a University

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. maj 2023

Primær færdiggørelse (Anslået)

30. maj 2026

Studieafslutning (Anslået)

30. maj 2026

Datoer for studieregistrering

Først indsendt

20. maj 2026

Først indsendt, der opfyldte QC-kriterier

28. maj 2026

Først opslået (Faktiske)

1. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

1. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

28. maj 2026

Sidst verificeret

1. marts 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • SANA2023-LECLO03

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

The study involves sensitive clinical information of infertile women, and sharing these data compromises participant privacy and confidentiality.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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