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Transfer of Frozen Embryos in Natural Cycle: Evaluation of Impact of Spontaneous Versus HCG-triggered Ovulation on Pregnancy Rate

Transfer of Frozen Embryos in NATural Cycle: Evaluation of Impact of Spontaneous Versus HCG-triggered Ovulation on Pregnancy Rate - Bicentric Prospective Open Randomized Controlled Trial

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03428165
Acronym
TECNAT
Enrollment
103
Registered
2018-02-09
Start date
2018-03-07
Completion date
2022-02-01
Last updated
2025-12-04

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

Conditions

in Vitro Fertilization

Brief summary

The purpose of the study is to evaluated whether there is a difference in pregnancy rate when transferring frozen embryos between patietns having spontaneously ovulated versus those triggered to voulate with HCG.

Interventions

OTHERHCG

250 μg/0.5ml choriogonadotropine alpha, Ovitrelle, Merck Serono

Sponsors

Centre Hospitalier Universitaire de Nīmes
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 40 Years
Healthy volunteers
No

Inclusion criteria

* The patient must have given their free and informed consent and signed the consent form * The patient must be a member or beneficiary of a health insurance plan * The patient is aged between 18 and 40 * Patient has regular cycles and classified as 'easy' for transfer of a frozen embryo at blastocyste stage (vitrification day 5)

Exclusion criteria

* The subject is participating in an interventional study, or is in a period of exclusion determined by a previous study * The subject refuses to sign the consent * It is impossible to give the subject informed information * The patient is under safeguard of justice or state guardianship * Patient using donated oocytes * Necessity of pre-implantation diagnosis * Patients with stage 3 or 4 endometriosis or adenomyosis

Design outcomes

Primary

MeasureTime frameDescription
Pregnancy rate after transfer of frozen embryos at day 14 between groupsDay 14Yes/no; Blood ßHCG \> 100UI/L

Secondary

MeasureTime frameDescription
Miscarriage rate within first 12 weeksWeek 12Yes/no; ultrasound
Live birthAt delivery, maximum week 42Yes/no
Pregnancy termAt delivery, maximum week 42Weeks
Pregnancy rate at week 12Week 12Yes/no; ultrasound
Cancellation of transfer due to premature ovulation (progesterone >3ng/ml and/or Luteinizing hormone > 3-fold base level)Day 0Yes/no
Number of visits for endometrial preparation until attaining LH peakDay 0Number of visits
Birth weightAt delivery, maximum week 42Kg

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 9, 2026