Calculatrice de date de terme après transfert ET
Calculate IVF due date after day 3 or 5 transfer; fresh and frozen use the same formula.
Réponse rapide
La calculatrice ET estime le terme à partir du transfert et de l'âge embryonnaire (J3 ou J5). Transferts frais et congelés se datent pareil.
Essayer des outils connexes
Use our basés sur des sources calculators to get helpful insights.
What a Post-Transfer ET Calculator Does
After a positive beta, the usual question is: what is my due date?
IVF dating is often more precise because the clinic knows embryo age on transfer day. An ET calculator uses those data — not your last period.
Use IVF Due Date Calculator with retrieval, day 3, or day 5 blastocyst transfer.
Why LMP Does Not Apply in IVF
- Natural cycles are often medicated or suppressed
- Fertilization occurs in the laboratory
- Transfer date and embryo age are documented
Day 3 vs Day 5 Transfer
| Transfer | Age on transfer day | Typical calculation |
|---|---|---|
| Day 3 embryo | 3 days | Transfer date + 263 days |
| Day 5 blastocyst | 5 days | Transfer date + 261 days |
Example: Transfer March 10, 2026 — Day 3 ≈ Nov 28; Day 5 ≈ Nov 26.
Fresh vs Frozen (FET)
Same formula. A frozen day-5 blastocyst transferred today dates like a fresh day-5 transfer.
Common Mistakes
- Wrong transfer type in calculator
- Confusing retrieval with transfer
- Using medicated prep LMP
When to Contact Your Clinic
- Result very different from clinic portal
- Unclear day 3 vs day 5
- Heavy bleeding or severe pain during wait
Related
FAQ
Q: Is FET less accurate? A: No. Embryo age on transfer day counts.
Q: Does it replace ultrasound? A: No. It explains dating logic; follow clinical protocol.
Educational content. Confirm your due date with your fertility clinic.