IVF Transfer to Test Date Calculator
From your embryo transfer date and embryo day, estimate the beta hCG blood-test date, the earliest home-test day, and an approximate due date.
How it works
beta test = transfer + days post-transfer · embryo age ≈ embryo day + days post-transfer · due date ≈ transfer + (266 − embryo day)
A frozen or fresh embryo transfer restarts the clock at a known embryo age, so the beta hCG blood test is scheduled a fixed number of days after transfer — usually 9 to 14, earlier for blastocysts than for day-3 embryos. Adding the embryo day to the days post-transfer gives an equivalent "days past ovulation", which is why a 9dp5dt test is roughly like testing 14 DPO in a natural cycle. The due-date estimate counts 266 days of gestation from conception, adjusting for how many days the embryo had already grown.
Worked example
A day-5 blastocyst transferred September 1, 2026 with a beta test 9 days later is tested on September 10. The embryo age is 5 + 9 = 14 days (≈ 14 DPO), and the due date is about 261 days after transfer.
Frequently asked questions
Why do day-5 embryos test sooner than day-3?
A day-5 blastocyst is already two days more developed than a day-3 embryo, so it reaches the same hCG-producing stage sooner after transfer. Clinics adjust the beta day accordingly.
Can I trust a home test before the beta date?
Home tests can turn positive a couple of days before the clinic beta, but early results are unreliable — a trigger shot can linger and cause a false positive, and low hCG can read negative. The blood test is definitive.
Is the due date exact?
No. It uses 266 days from conception, which is an average; your clinic will confirm dating with an early ultrasound that can shift it by several days.
Related calculators
Educational estimate only — follow the exact test date your fertility clinic gives you.