What is Medicated FET?
💡 Medicated FET uses exogenous estrogen (tablets or patches) to grow the endometrium to ≥7mm followed by progesterone to initiate secretory transformation. Transfer is scheduled 5 days after progesterone start (blastocyst). Suitable for all patients including anovulatory and irregular-cycle women.
Medicated FET is a frozen embryo transfer protocol using exogenous estrogen to grow the endometrium and exogenous progesterone to trigger secretory transformation. It is the most widely used FET protocol globally — controllable, predictable, and suitable for all patients regardless of cycle regularity.
🇮🇳 India Context: Medicated FET is widely assessed and treated across major Indian fertility centres including Chennai, Mumbai, Bangalore, Delhi, and Hyderabad.
What are the key characteristics of Medicated FET?
- Estrogen phase: oral estradiol valerate (2–8mg/day) or estradiol patches (100–200mcg) for 10–14 days
- Target endometrial thickness: ≥7mm with trilaminar (triple-line) pattern on transvaginal ultrasound
- Progesterone started when endometrium is ready: micronised progesterone 400–800mg/day vaginal or IM 50–100mg/day
- Embryo transfer scheduled Day 5 after progesterone start (blastocyst) or Day 3 (cleavage embryo)
- Cancellation rate is low — estrogen dose can be increased or phase extended if thickness is insufficient
- Suitable for all patients: anovulatory (PCOS), irregular cycles, thin endometrium, prior failed natural FET
- GnRH agonist down-regulation may be added for endometrial synchronisation in selected cases
- Luteal phase support continues until 10–12 weeks of pregnancy after confirmed positive result
What does Medicated FET involve?
Why does Medicated FET matter in fertility?
Medicated FET is the most controllable FET protocol — transfer timing is determined entirely by the progesterone start date, enabling precise scheduling. It eliminates spontaneous cycle cancellation risk from LH surge or anovulation. However, exogenous progesterone supplementation is required throughout the first trimester. Emerging evidence suggests medicated FET may carry slightly higher rates of large-for-gestational-age neonates and pre-eclampsia compared to natural cycle FET — an active area of clinical research guiding protocol selection in women with regular cycles.
What are related terms to Medicated FET?
Natural Cycle FET
Natural cycle FET is a frozen embryo transfer protocol in which the embryo is tr…
Endometrial Preparation
Endometrial preparation is the hormonal or natural-cycle process of conditioning…
Embryo Transfer
Embryo Transfer is the final step of the IVF process. A laboratory-cultured embr…
Progesterone
Progesterone is a hormone produced by the corpus luteum — the structure left in …
IVF (In Vitro Fertilisation)
IVF (In Vitro Fertilisation) is an assisted reproductive technology (ART) in whi…
FAQs about Medicated FET
Who needs medicated FET?
Medicated FET is required for women with anovulatory cycles (PCOS), irregular menstruation, or premature ovarian insufficiency — where natural cycle FET is not feasible. It is also preferred when precise transfer timing is needed or if a previous natural cycle FET was cancelled.
How long does medicated FET preparation take?
Medicated FET endometrial preparation takes 10–14 days of estrogen followed by 5 days of progesterone before transfer. Total cycle from Day 1 to transfer is approximately 18–22 days. No monitoring is required as frequently as in a natural cycle.
How long do I take progesterone after medicated FET?
Progesterone support continues after embryo transfer and — if pregnancy is confirmed — is maintained until 10–12 weeks of pregnancy, when the placenta takes over progesterone production. Stopping progesterone before 10 weeks in a medicated FET may compromise early pregnancy.
Is medicated FET or natural cycle FET better?
In women with regular cycles, evidence shows equivalent outcomes. Natural cycle FET has lower medication burden and potentially lower rates of pre-eclampsia and large-for-gestational-age babies. Medicated FET offers greater scheduling control and no cancellation risk from anovulation.
How much does medicated FET cost in India?
Medicated FET medications (estrogen + progesterone) cost ₹5,000–₹15,000. Total medicated FET cycle cost (including monitoring, medications, and transfer procedure) is approximately ₹30,000–₹80,000 depending on the clinic and number of monitoring scans required.
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