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Clomiphene citrate plus Letrozole versus Clomiphene citrate alone for ovulation induction in infertile women with ovulatory dysfunction: a randomized controlled trial

Clomiphene citrate plus Letrozole versus Clomiphene citrate alone for ovulation induction in infertile women with ovulatory dysfunction: a randomized controlled trial

Status
Active, not recruiting
Phases
Phase 4
Study type
Interventional
Source
TCTR
Registry ID
TCTR20201108004
Enrollment
100
Registered
2020-11-08
Start date
2020-11-15
Completion date
Unknown
Last updated
2026-08-03

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

Conditions

ovulation rate serum progesterone more than 3 ng/ml

Interventions

Letrozole 2.5 mg/day plus clomiphene citrate 50 mg/day for 5 days on day3&#45
7 of cycle,Clomiphene citrate 50 mg/day for 5 days on day3&#45
7 of cycle
Experimental Drug,Active Comparator Drug
Letrozole plus clomiphene citrate,Clomiphene citrate alone

Sponsors

Faculty of medicine, Siriraj Hospital
Lead Sponsor

Eligibility

Sex/Gender
Female
Age
18 Years to 40 Years

Inclusion criteria

Inclusion criteria: 1. Women age between 18 and 40 years old 2. Infertile 3. Chronic anovulation (cycle length more than 35 days or diagnosed with PCOS) 4. Thai

Exclusion criteria

Exclusion criteria: 1. Pregnancy 2. Received letrozole or clomiphene citrate within 3 month prior 3. Other causes of infertile, e.g. thyrotoxicosis, hyperprolactinemia 4. Uncontrolled underlying disease such as uncontrolled diabetes mellitus, uncontrolled hypertension, CA cervix 5. Allergic or contraindication to letrozole or clomiphene citrate 6. Husband has total motile sperm count less than 10 million

Design outcomes

Primary

MeasureTime frame
ovulation rate day 21 or 22 of cycle in patients with negative urinary LH test or 7 days after positive urinary LH serum progesterone in ng/ml

Secondary

MeasureTime frame
side effect of medication after complete medication course inquiry questionnaires,Conception rate seven days after positive serum progesterone or day 35 of cycle if negative serum progesterone Urine pregnancy test,Clinical pregnancy 7 weeks after LMP Fetal heart beat,number of Dominant follicle day 12-14 of cycle Transvaginal ultrasound

Countries

Thailand

Contacts

Public ContactSirikul Tanpong

Siriraj hospital

proudsirikul@gmail.com0852227591

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026