FET Due Date Calculator
Calculate your due date from frozen embryo transfer with pregnancy milestones for IVF pregnancies
Last updated: December 2024
The date of your FET procedure
Most FETs use Day 5 or 6 blastocysts
Common Questions
How is FET due date calculated?
For frozen embryo transfers, we know the exact conception date. We subtract the embryo age (3, 5, or 6 days) from transfer date to get conception, then subtract 14 more days to get your "last menstrual period" (LMP). Your due date is 280 days from that LMP date.
Is FET dating accurate?
Yes, FET due date calculations are highly accurate because we know the exact conception date. Unlike natural pregnancy where ovulation is estimated, with FET we know precisely when the embryo was created. However, actual delivery can vary by ±2 weeks from the due date.
Do Day 3 and Day 5 transfers have different due dates?
Yes, Day 5 embryo transfers result in a due date 2 days earlier than Day 3 transfers because the embryo is already 5 days old at transfer (vs 3 days old). This means your pregnancy is technically "further along" with a Day 5 transfer.
How long do I continue progesterone after FET?
Most clinics continue progesterone supplementation until 10-12 weeks of pregnancy, when the placenta takes over progesterone production. Never stop medications without your doctor's approval, as stopping too early can risk pregnancy loss.
Top Parenting Essentials
Nature Made Prenatal with Folic Acid + DHA
Support your baby's development with complete prenatal vitamins including folic acid and DHA.
HelloBaby No WiFi Baby Monitor (5" Screen)
30-hour battery, night vision, 2-way talk, and 1000ft range. No WiFi or app required - completely private.
Pampers Pure Protection Baby Diapers
Up to 100% leakproof protection with hypoallergenic, plant-based materials for your baby's delicate skin.
Graco Slimfit 3-in-1 Convertible Car Seat
Ultra-space-saving 3-in-1 design: rear-facing, forward-facing, and highback booster. Safety-certified from birth to 100 lbs.
Momcozy U-Shaped Pregnancy Pillow (57")
Support your back, belly, and hips with this full-body pregnancy pillow designed for side sleepers. Includes cooling cover.
Philips Avent Natural Baby Bottles (4-Pack)
Natural Response nipples designed to mimic breastfeeding for easy bottle transition. Wide neck for easy cleaning.
As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
Get All 29 Printable Planners in One Download
From pregnancy trackers to toddler meal planners — the Complete Parenting Toolkit gives you professionally designed, printable tools for every stage.