移植後ET計算機：IVF出産予定日ガイド
Calculate your due date after day 3 or day 5 embryo transfer with our free ET calculator.
クイック回答
ET計算機は移植日と胚龄（3日または5日）から出産予定日を推定します。凍結・新鮮移植は同じ日付けです。
What an ET Calculator Does After Transfer
After a positive beta, the next question is often: when is my due date?
IVF pregnancies are usually dated more precisely because clinics know embryo age on transfer day. An ET calculator uses transfer data — not last period.
Use IVF Due Date Calculator for retrieval, day 3, or day 5 transfer.
Why LMP Does Not Apply in IVF
- Natural cycles are often medicated or suppressed
- Fertilization happens in the lab
- Transfer date and embryo age are documented
Day 3 vs Day 5 in the ET Calculator
| Transfer | Age on transfer | Typical calculation |
|---|---|---|
| Day 3 cleavage | 3 days post-fertilization | Transfer + 263 days |
| Day 5 blastocyst | 5 days post-fertilization | Transfer + 261 days |
Example: Transfer March 10, 2026 — Day 3 ≈ Nov 28; Day 5 ≈ Nov 26.
Fresh vs Frozen (FET)
Frozen embryos date the same as fresh — developmental stage on transfer day counts, not cryostorage duration.
DPT and Beta hCG
Many clinics schedule first beta hCG between 9–14 days past transfer. Trend matters more than one value.
More: Beta hCG After IVF · Days Past Transfer Chart
Common ET Calculator Mistakes
- Wrong day 3 vs day 5 selection
- Confusing retrieval and transfer dates
- Using medicated-cycle LMP
When to Contact Your Clinic
- Calculator differs greatly from portal EDD
- Unclear transfer stage
- Heavy bleeding or severe pain during two-week wait
Related
FAQ
Q: Is ET calculator less accurate for frozen transfer? A: No. Developmental age on transfer day counts.
Q: Retrieval date only? A: Yes, if your clinic dates that way.
Q: Does it replace ultrasound? A: No. It explains dating logic; follow clinic protocol.
Educational content. Confirm your due date with your fertility clinic.