Trial to Assess the Pattern of Use of REKOVELLE® in Women Undergoing In Vitro Fertilisation (IVF) or Intracytoplasmic Sperm Injection (ICSI) Procedures in Routine Clinical Practice
NORSOS
Nordics and Switzerland Prospective Multicentre Non-Interventional Observational Study to Assess the Pattern of Use of REKOVELLE® in Women Undergoing In Vitro Fertilisation (IVF) or Intracytoplasmic Sperm Injection (ICSI) Procedures in Routine Clinical Practice (NORSOS)
1 other identifier
observational
201
4 countries
9
Brief Summary
Study designed to observe the usage patterns, efficacy and safety of REKOVELLE® in women naive to IVF and ICSI, undergoing their first Controlled Ovarian Stimulation (COS) treatment cycle with REKOVELLE® in routine clinical practice.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for all trials
Started Aug 2022
9 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
July 11, 2022
CompletedFirst Posted
Study publicly available on registry
August 12, 2022
CompletedStudy Start
First participant enrolled
August 28, 2022
CompletedPrimary Completion
Last participant's last visit for primary outcome
March 14, 2024
CompletedStudy Completion
Last participant's last visit for all outcomes
March 14, 2024
CompletedOctober 2, 2025
October 1, 2025
1.5 years
July 11, 2022
October 1, 2025
Conditions
Outcome Measures
Primary Outcomes (8)
Use of the algorithm-based individualized dosing regimen (daily dose of REKOVELLE® administered)
Calculated with body weight and AMH serum level to define the daily dose of REKOVELLE®
Up to day 1 of REKOVELLE® stimulation
Daily dose of REKOVELLE®
From day 1 up to day 20 of REKOVELLE® stimulation
Number of days of treatment with REKOVELLE®
From day 1 up to day 20 of REKOVELLE® stimulation
REKOVELLE® Dose changes
Dose changes is the discretion of the investigator
From day 1 up to day 20 of REKOVELLE® stimulation
Use of the Algorithm dosing Application
Use of the Ferring developed dosing app for the daily dose calculation by answering yes/no
Up to day 1 of REKOVELLE® stimulation
Use of GnRH protocol for Lutenizing Hormone surge suppression
Defined as a choice between GnRH agonist and GnRH antagonist
Up to day 10
Type of drug used for triggering of follicle maturation
Defined as a choice between hCG or GnRH
Between Day 8 and Day 14
Luteal phase support
Type and the length of luteal phase support is the discretion of the investigator. Decided as a choice between Progesterone, Oestrogen and hCG
24-72 hours after oocyte-retrieval
Secondary Outcomes (14)
Rate of ongoing pregnancy (≥1 intrauterine viable fetus 10-11 weeks after embryo transfer) in the fresh cycle
10-11 weeks after embryo transfer
Rate of ongoing pregnancy (≥1 intrauterine viable fetus 10-11 weeks after embryo transfer) following the fresh cycle, including also the first frozen embryo transfer
10-11 weeks after embryo transfer
Number of oocytes retrieved
Following 1st cycle with REKOVELLE® (each cycle range is 5-20 days, average 9 days) at 34-36 hours
Number of oocytes/embryos/blastocysts frozen
Following 1st cycle with REKOVELLE® (each cycle range is 5-20 days, average 9 days) after oocyte retrieval
Number of embryos/blastocysts transferred
Following 1st cycle with REKOVELLE® (each cycle range is 5-20 days, average 9 days) after oocyte retrieval
- +9 more secondary outcomes
Study Arms (1)
REKOVELLE®
Interventions
Subjects must be treated according to the routine clinical practice and REKOVELLE® must be prescribed in accordance with the terms of the marketing authorisation of each participating country. According to the label the REKOVELLE® dose should be based on a recent determination of body weight and a recent determination of Anti-Müllerian Hormone (AMH) (i.e. within the last 12 months) measured by the following diagnostic tests: ELECSYS AMH Plus immunoassay from Roche or alternatively the ACCESS AMH Advanced from Beckman Coulter or LUMIPULSE G AMH from Fujirebio.
Eligibility Criteria
Women who are prescribed REKOVELLE® undergoing assisted reproductive technologies (ART) such as an in vitro fertilisation (IVF) or intracytoplasmic sperm injection (ICSI) cycle.
You may qualify if:
- Females aged 18 years or older at enrolment
- Who have never been treated with (naïve) in vitro fertilisation (IVF) or intracytoplasmic sperm injection (ICSI) treatment using fresh or frozen ejaculated sperm from male partner or sperm donor
- Who are prescribed REKOVELLE® for the first time, using the dosing algorithm-based on AMH test result and body weight to define the 1st cycle dose regimen with REKOVELLE® according to the approved label
- Who have been informed verbally and in writing about this trial content, signed the inform consent and who do not object to their data being electronically processed
You may not qualify if:
- Currently participating in an interventional clinical trial in which any treatment or follow-up is mandated
- Women with a contraindication for prescription of REKOVELLE® treatment
- Hypersensitivity to the active substance or to any of the excipients
- Tumours of the hypothalamus or pituitary gland
- Ovarian enlargement or ovarian cyst not due to polycystic ovarian syndrome
- Gynaecological haemorrhages of unknown aetiology
- Ovarian, uterine, or mammary carcinoma
- Primary ovarian failure
- Malformations of sexual organs incompatible with pregnancy
- Fibroid tumours of the uterus incompatible with pregnancy
- Pregnancy and breast feeding
- Women who undergo ovarian stimulation for fertility preservation
- Women placed under judicial protection, guardianship, or supervision
- Women who are considered as vulnerable population
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (9)
Ferring Investigational Site
Copenhagen, Denmark
Ferring Investigational Site
Horsens, Denmark
Ferring Investigational Site
Køge, Denmark
Ferring Investigational Site
Odense, Denmark
Ferring Investigational Site
Søborg, Denmark
Ferring Investigational Site
Skien, Norway
Ferring Investigational Site
Malmo, Sweden
Ferring Investigational Site
Baden, Switzerland
Ferring Investigational Site
Basel, Switzerland
Related Publications (1)
Pinborg A, Sopa N, Ekerhovd E, Iliadis SI, Kaspersen J, Gravotta E, Quaas A. Effectiveness and safety of follitropin delta in routine clinical practice in the Nordics and Switzerland (the NORSOS study): a prospective non-interventional study. Front Endocrinol (Lausanne). 2025 Sep 5;16:1613680. doi: 10.3389/fendo.2025.1613680. eCollection 2025.
PMID: 40979710BACKGROUND
MeSH Terms
Interventions
Study Officials
- STUDY DIRECTOR
Global Clinical Compliance
Ferring Pharmaceuticals
Study Design
- Study Type
- observational
- Observational Model
- COHORT
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
July 11, 2022
First Posted
August 12, 2022
Study Start
August 28, 2022
Primary Completion
March 14, 2024
Study Completion
March 14, 2024
Last Updated
October 2, 2025
Record last verified: 2025-10
Data Sharing
- IPD Sharing
- Will not share