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Success Rate Natural Cycles Versus Modified Natural Cycles in Frozen Embryos

Comparison of Clinical Results of Frozen Embryo Transfer in Natural and Modified Natural Cycles

Status
UNKNOWN
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT03798886
Enrollment
100
Registered
2019-01-10
Start date
2018-01-01
Completion date
2019-12-01
Last updated
2019-03-13

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

Conditions

Infertility, Female

Keywords

Frozen embryo replacement, IVF success, ovarian stimulation

Brief summary

There has been a recent significant increase in the frozen embryo replacement (FER) cycles due to freeze-all cycles to decrease the risk of ovarian hyperstimulation syndrome. Now a days making frozen embryo transfers (FETs) a viable alternative to fresh embryo transfer

Detailed description

There has been a recent significant increase in the frozen embryo replacement (FER) cycles due to freeze-all cycles to decrease the risk of ovarian hyperstimulation syndrome. Now a days making frozen embryo transfers (FETs) a viable alternative to fresh embryo transfer, with reports from observational studies and randomized controlled trials suggesting that: 1. The endometrium in stimulated cycles is not optimal for implantation 2. Pregnancy rates are increased following FET 3. Perinatal outcomes are less affected after FET 4. Preimplantation genetic screening We will follow only natural and modified natural cycles patients. Spontaneous ovulation will documented with hormonal and sonographic monitoring. Hormonal monitoring are including estradiol and luteinizing hormone (LH). Sonographic monitoring is including follicule diameter (16-20 mm). At modified natural cycles we will use hCG triggering for ovulation approximately 16-20 mm diameter. We will compare success rate between natural and modified natural cycles

Interventions

When follicle is ready for ovulation, we will use this injection by intra-dermal route

we will use that drug in the natural modified transfer group after embryo transfer

OTHERembryo transfer

we will do transfer when the endometrium is ready

Sponsors

Acibadem University
Lead SponsorOTHER

Study design

Observational model
OTHER
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 40 Years
Healthy volunteers
Yes

Inclusion criteria

* Patient who are admitted to the IVF center and who will be transferred to frozen embryos. * Infertile women under 40 years of age who accepted this study. * Unexplained infertilite couple. * All ovulatory patient. * Male factor. * Tubal factor.

Exclusion criteria

* Patients who made intrauterin surgery. * Over 40 years of age women. * Patients with preimplantation genetic diagnosis. * Anovulatory patient.

Design outcomes

Primary

MeasureTime frameDescription
birthbigger than 24 weeks pregnancylive birth

Secondary

MeasureTime frameDescription
pregnancy rate10th day after embryo transferhcg blood test
clinical pregnancy rate8 weekspositive fetal cardiac activity
abortion rate8 weeksabortion after visualization of fetal cardiac activity

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026