Last reviewed 2026-05-15 · How we verify

Lutinus + transfer day 7

Lutinus is a progesterone supplement used to support luteal phase function and embryo implantation during assisted reproductive technology cycles.

Lutinus is a progesterone supplement used to support luteal phase function and embryo implantation during assisted reproductive technology cycles. Used for Luteal phase support in assisted reproductive technology (ART) cycles, Embryo implantation support in in vitro fertilization (IVF).

At a glance

Mechanism of action

Lutinus (micronized progesterone) provides exogenous progesterone to supplement endogenous production during the luteal phase after ovulation or embryo transfer. Progesterone is essential for endometrial preparation and maintenance of early pregnancy, particularly in assisted reproduction where luteal phase support may be inadequate. Administration on transfer day 7 (or similar timing) helps ensure adequate progesterone levels during the critical window of embryo implantation and early pregnancy establishment.

Approved indications

• Luteal phase support in assisted reproductive technology (ART) cycles
• Embryo transfer support in in vitro fertilization (IVF)

Common side effects

• Vaginal irritation or discharge
• Headache
• Breast tenderness
• Abdominal discomfort

Key clinical trials

• Preparing and Timing of the Endometrium in Modified Natural Cycle Frozen-thawed Embryo Transfers (PHASE4)
• Progesterone as Luteal Support in Frozen IVF Natural Cycles (PHASE4)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

• Lutinus + transfer day 7 CI brief — competitive landscape report
• Lutinus + transfer day 7 updates RSS · CI watch RSS
• Anja Bisgaard Pinborg portfolio CI