CClinicalTrials.gg
Status unknownNCT04331197Updated Apr 2, 2020

BMI Effect on the Response to Ovulation Induction in Letrozole vs Clomid

A Phase 4 interventional study of Clomiphene Citrate 50mg and Letrozole 2.5mg in Subfertility, sponsored by Cairo University. Status unknown. Open to female participants aged 18 Years to 45 Years. Per ClinicalTrials.gov, last updated 2020-04-02.

Sponsored by Cairo University · Phase 4, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Mar 2020), so the status shown — last known as Not yet recruiting — may be out of date.
Phase
Phase 4
Study type
Interventional
Enrollment
160
Allocation
Randomized
Ages
18 Years to 45 Years
Sex
Female
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Study summary

There is an increased prevalence of high Body mass index (BMI) all over the world.High BMI is shown to have an impact on the female reproductive system.It can contribute to both ovulatory and anovulatory subfertility.

Clomiphene citrate and Letrozole have been used for treatment of infertility.Both are used for induction of ovulation.

Clomiphene citrate is an estrogen receptor antagonist .It increases serum FSH and it has its limitation due to his antiestrogenic effect,it has an ovulation rate 70-80% but pregnancy rate is only 22% because of its anti-estrogenic effect on endometrium and poor cervical mucus (Legro RS et al.,2007) Letrozole is an aromatase inhibitor which inhibits the production of estrogen, which influences the action of the brain's hypothalamus and pituitary on the functioning of the ovaries by increasing FSH.Due to the antiestrogenic effect of clomiphene citrate,Letrozole can be used as an alternative.

The investigators are comparing the effect of both medications on the outcome of the induction of ovulation in women with high BMI.

Read the detailed description

This is a Randomized controlled trial .The researchers include160 women with BMI more than 30 who were suffering from subfertility for more than 2 years. The investigators will randomise them into 2 groups. Group A:They were prescribed 100 mg of clomiphene citrate from day 2-5 of the cycle for 5 days. Group B : They were prescribed 5 mg of Letrozole from day 2-5 of the cycle.

Vaginal ultrasound was performed on day 11 of the cycle, After at least one follicle reached 15 mm, The patient was encouraged to have sexual intercourse every other day for few days.The patients will have a midluteal progesterone level to confirm ovulation and will have a pregnancy test in 2 weeks if missed period. The researchers will compare the number of mature follicles, endometrial thickness on the day when there are mature follicles, occurrence of pregnancy, multiple pregnancies, and miscarriages .

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Conditions studied

  • Subfertility

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03

In context

Infertility

2,506 studies on the registry are indexed under Infertility; 407 are open to participants now.

This study's planned enrollment of 160 is above the median of 120 across 1,698 interventional studies indexed under Infertility.

Browse Infertility studies →

Lead sponsor

Cairo University is the lead sponsor of 4,780 studies on the registry; 1,427 are open to participants now.

Of its 36 completed or terminated interventional studies of FDA-regulated products, 5 (14%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Age: 18-45 years old.
  • History of subfertility for 2 years.
  • No previous IVF
  • Intact tubes as evidenced by HSG or Hycosy
  • Normal Sperm parameters according to WHO criteria.
  • Ability to have regular intercourse during the ovulation induction phase of the study.

Exclusion criteria

Exclusion Criteria:

  • Age less than 18 years old or older than 45 years old.
  • FSH> 15 mIU/ml
  • Tubal factor of infertility
  • Male factor of infertility
  • Current pregnancy,abnormal uterine bleeding.
  • History of use of hormonal contraception in the last 3 months.
  • Untreated medical problems: thyroid disease,hyperprolactinemia or contraindication to pregnancy as uncontrolled diabetes or severe heart disease.
  • Contraindications to clomiphene citrate: hypersensitivity to clomid.
  • Contraindications to letrozole: hypersensitivity to letrozole .
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
160 participants (estimated)

Study arms

  • Active comparator
    Clomiphene Citrate-High BMI women

    Clomid 50 mg, 2 tablets orally every day from day 2-5 of the period for 5 days

    Drug: Clomiphene Citrate 50mg

  • Active comparator
    Letrozole-High BMI women

    Femara 2.5 mg, 2 tablets orally every day from day 2-5 of the period for 5 days

    Drug: Letrozole 2.5mg

Interventions

  • DrugClomiphene Citrate 50mg

    Clomid 50 mg, 2 tablets orally every day from day 2-5 of the period for 5 days

    Also known as: Clomid

  • DrugLetrozole 2.5mg

    Femara 2.5 mg, 2 tablets orally every day from day 2-5 of the period for 5 days

06

What researchers measure

Primary outcomes

  1. Evidence of ovulation

    Raised concentration of serum progesterone

    Time frame: day 21 of 28 day cycle or 7 days post LH surge

Secondary outcomes

  1. Number of mature follicles

    Number of follicles\> 15mm

    Time frame: day 12-19 of the cycle (At the end of the treatment cycles, each cycle 28 days)

  2. Endometrial thickness

    the thickest part of the endometrial lining at the longitudinal plane at the time of mature follicle

    Time frame: day 12-19 of the cycle (At the end of the treatment cycles, each cycle 28 days)

  3. Conception

    Number of participants with positive pregnancy test (serum or urine),serum BHCG \> 25 IU/L

    Time frame: 4-5 weeks post treatment

  4. clinical pregnancy

    Number of participants with gestational sac with positive fatal pulsation

    Time frame: 6 weeks post treatment

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Study locations

No study locations are listed for this record.

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References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 2, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04331197
Lead sponsor
Cairo University
Responsible party
Eman Elkattan (Associate professor, Cairo University) — Principal investigator
First posted
Apr 2, 2020
Start date
May 1, 2020 (estimated)
Primary completion
May 1, 2021 (estimated)
Completion
Jun 1, 2021 (estimated)
Last update
Apr 2, 2020

Study contacts

Eman Elkattan, MD,MRCOG,DFSRH
Contact
emyelkattan@gmail.com
01212529213
Amira Saeed, MD
Contact
amirasaied2026@gmail.com

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Mar 2020. You cannot join it, but the record below documents what was studied.

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