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Estradiol and Progesterone Levels Following Frozen Embryo Transfer

Estradiol and Progesterone Levels in Early Pregnancy After Natural, Estradiol + Progesterone or Gonadotrophin Stimulated Frozen Embryo Transfer Cycle

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04997525
Acronym
ESTRO-FET
Enrollment
305
Registered
2021-08-09
Start date
2021-04-20
Completion date
2024-12-06
Last updated
2025-01-03

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

Conditions

Infertility

Brief summary

The aim of the present study is to investigate serum estradiol and progesterone levels in women conceiving after natural, estradiol + progesterone or gonadotropin stimulated frozen embryo transfer (FET) cycles.

Detailed description

Enrolled women will be randomized based on their ovulation pattern. Ovulatory women will be randomized to either natural cycle or estradiol + progesterone substituted cycle treatment for FET. Anovulatory women will be randomized to either estradiol + progesterone substituted cycle or gonadotropin stimulated cycle treatment for FET. Included women will undergo blood testing every two weeks for serum estradiol and progesterone levels until gestational age 9+6. Routine vaginal ultrasounds will be performed as well as additional pregnancy ultrasounds. Secondary obstetric outcomes will be investigated using the womens medical journals. All the treatments are considered standard treatments for FET.

Interventions

Combined with progesterone

DRUGProgesterone

Combined with estradiol

Combined with hCG

DRUGChorionic Gonadotropin, Alpha

In either natural cycle or combined with Follitropin Alfa

Sponsors

Copenhagen University Hospital, Hvidovre
CollaboratorOTHER
Copenhagen University Hospital at Herlev
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE

Eligibility

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

Inclusion criteria

* Age \> 18 years \< 40 years * BMI \< 35 kg/m2 * Normal wet smear within the past three years * Thawed blastocysts (day 5 or 6) after either IVF or ICSI treatment

Exclusion criteria

* Age \< 18 years * BMI \> 35 kg/m2 * Oocyte donation * HIV/ hepatitis * Undiagnosed vaginal bleeding * Uterine malformations * Persisting ovarian cysts * Tumors in Hypothalamus, pituitary, thyroid or adrenal * Previous breast cancer * BRCA1/2 * Unregulated thyroid disease * Cardiovascular disease * Breast feeding * Present or previous chemotherapy/radiation therapy * Present or previous malignant disease * Smoking * Alcohol/drug abuse

Design outcomes

Primary

MeasureTime frameDescription
Serum estradiol10 weeksBlood samples in the first 10 weeks of pregnancy
Serum progesterone10 weeksBlood samples in the first 10 weeks of pregnancy

Secondary

MeasureTime frameDescription
Gestational age at deliveryAt deliveryWeeks of pregnancy when the child has been delivered
Child birth weightAt deliveryWeight of the child at delivery
Obstetric complications9 monthsObsteric complication throughout pregnancy
Child malformations9 monthsChild malformations diagnosed in utero or at delivery

Countries

Denmark

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 12, 2026