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Recombinant FSH Pregnancy: Not indicated during pregnancy or breast-feeding. No teratogenic risk has been reported following controlled ovarian stimulation in clinical use with gonadotropins, and there are no data from inadvertent exposure in pregnant women; animal studies have shown reproductive toxicity at doses above the recommended maximal human dose.

Follitropin delta

Brand names: Rekovelle

A recombinant human follicle-stimulating hormone (follitropin delta) used for controlled ovarian stimulation in women undergoing assisted reproduction such as IVF/ICSI.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: Individualised by serum AMH and body weight. AMH below 15 pmol/L: 12 micrograms daily, irrespective of body weight. AMH 15 pmol/L or above: 0.19 down to 0.10 micrograms/kg daily, decreasing with increasing AMH concentration (see notes for the full band table).
Route: Subcutaneous injection, preferably in the abdominal wall
Frequency: Once daily; the individual daily dose is maintained throughout the stimulation period
Max: Maximum daily dose for the first treatment cycle is 12 micrograms. Maximum daily dose (subsequent cycles) is 24 micrograms.
UNITS: REKOVELLE is dosed in MICROGRAMS, not IU — the SPC states 'The dosing regimen is specific for REKOVELLE and the microgram dose cannot be applied to other gonadotropins.' DOSING TABLE (SPC §4.2 Table 1, AMH in pmol/L, micrograms/kg per day unless stated): below 15 = fixed 12 micrograms; 15-16 = 0.19; 17 = 0.18; 18 = 0.17; 19-20 = 0.16; 21-22 = 0.15; 23-24 = 0.14; 25-27 = 0.13; 28-32 = 0.12; 33-39 = 0.11; 40 or above = 0.10 micrograms/kg. Round the calculated dose to the nearest 0.33 micrograms to match the dosing scale on the injection pen. AMH must be from a recent determination (within the last 12 months) measured by ELECSYS AMH Plus (Roche), ACCESS AMH Advanced (Beckman Coulter) or LUMIPULSE G AMH (Fujirebio); express AMH in pmol/L rounded to the nearest integer (ng/mL x 7.14 = pmol/L). Measure body weight without shoes and overcoat just prior to the start of stimulation. START OF TREATMENT: with a GnRH antagonist protocol, initiate on day 2 or 3 after the start of menstrual bleeding; with GnRH agonist down-regulation, initiate approximately 2 weeks after the start of agonist treatment (a longer stimulation and higher total dose may be needed). Continue until adequate follicular development (3 or more follicles of 17 mm or more), on average by the ninth or tenth day (range 5 to 20 days). TRIGGER: a single injection of 250 micrograms recombinant hCG or 5,000 IU hCG. If there is excessive follicular development (25 or more follicles of 12 mm or more), stop REKOVELLE and do NOT trigger final follicular maturation with hCG. SUBSEQUENT CYCLES: maintain the same daily dose if the previous response was adequate without OHSS; increase by 25% or 50% for ovarian hypo-response; decrease by 20% or 33% for ovarian hyper-response; use a dose 33% lower if the patient developed OHSS or was at risk of OHSS in the previous cycle. Potential high responders (AMH above 35 pmol/L) have not been studied in a GnRH agonist down-regulation protocol. Anovulatory patients with polycystic ovarian syndrome have not been studied. The first injection should be performed under direct medical supervision; self-administration only by patients who are well motivated, adequately trained and with access to expert advice. There is no relevant use in the paediatric or elderly populations.

Dose adjustments

Renal

Safety, efficacy and pharmacokinetics in patients with renal or hepatic impairment have not been specifically studied in clinical trials; although limited, data did not indicate a need for a different dosing regimen in this population (SPC §4.2).

Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • 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
  • Should not be administered where treatment outcome is unlikely to be favourable: primary ovarian failure; malformations of sexual organs incompatible with pregnancy; fibroid tumours of the uterus incompatible with pregnancy

Side effects

  • Ovarian hyperstimulation syndrome (common)
  • Headache (common)
  • Pelvic pain, including pelvic discomfort and adnexa uteri pain (common)
  • Nausea (common)
  • Fatigue (common)
  • Uncommon: mood swings, somnolence, dizziness, diarrhoea, vomiting, constipation, abdominal discomfort, vaginal haemorrhage, breast discomfort

Clinical monograph

How it works

It stimulates ovarian follicular development through FSH receptors on granulosa cells; dosing is individualised using body weight and ovarian reserve markers.

Prescribing in practice

  • Ovarian hyperstimulation syndrome is the main serious risk, so treatment is specialist-supervised with careful monitoring.
  • Dosing is individualised (including by anti-Müllerian hormone and body weight) and the product is not interchangeable unit-for-unit with other follitropins.
  • Multiple pregnancy and thromboembolism risks are increased during stimulation; exclude relevant tumours and untreated endocrine disorders first.

Monitoring

Monitor follicular response with ultrasound (and oestradiol where indicated) to guide management and reduce hyperstimulation risk.

Counselling the patient

  • Dosing is tailored to you and differs from other FSH products, so follow your clinic's instructions exactly.
  • Report abdominal swelling, pain or breathlessness promptly.
  • There is an increased chance of multiple pregnancy.

Evidence & guidelines

Individualised follitropin delta dosing was evaluated against conventional FSH stimulation in the ESTHER randomised trial programme.

Reference: SmPC; Confirm identity and dosing against the manufacturer SPC (eMC) and NICE. Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.