IVF Due Date Calculator: Embryo Transfer Dating
Calculate your exact pregnancy due date, gestational age, and milestone timeline following a Day 3 or Day 5/6 blastocyst IVF embryo transfer.
Calculate Your IVF Due Date
Enter your embryo transfer date and embryo age below for an educational due date estimate.
The date your embryo was transferred
Used to estimate your current gestational age
Quick Summary
Specialized assisted reproduction calculator utilizing SART and ACOG embryo transfer dating protocols. Enter your transfer date and blastocyst maturity stage for accurate gestational age calculation.
How It Works
- Enter your embryo transfer date. The date your embryo was transferred.
- Select the embryo age. Choose Day 3, Day 5, or Day 6 based on your clinic’s transfer protocol.
- Optionally enter today’s date. Used to estimate your current gestational age (if different from today).
- Review your results. The calculator displays your estimated due date, estimated LMP, estimated conception date, and current gestational age. All estimates are for educational purposes only.
Formula Used
The calculator uses standard IVF pregnancy dating formulas. The offset from transfer date to estimated LMP depends on embryo age:
- Day 3 Embryo: LMP offset = 17 days (→ Due date = Transfer + 263 days)
- Day 5 Blastocyst: LMP offset = 19 days (→ Due date = Transfer + 261 days)
- Day 6 Blastocyst: LMP offset = 20 days (→ Due date = Transfer + 260 days)
The estimated conception date is calculated as the transfer date minus the embryo age in days (Day 3: −3 days, Day 5: −5 days, Day 6: −6 days).
Reference:: These formulas are based on the standard IVF pregnancy dating method described by ACOG and the Cleveland Clinic. The 280-day gestational duration from LMP is the standard Naegele’s rule used in obstetrics.
Evidence
The IVF pregnancy dating formulas used by this calculator are based on standard obstetric and reproductive medicine conventions:
- The American College of Obstetricians and Gynecologists (ACOG) recognizes that in IVF pregnancies, the due date can be calculated from the date of embryo transfer plus the standard 280-day gestational duration from the estimated LMP
- The Cleveland Clinic publishes patient education material explaining that for IVF pregnancies, the due date is calculated by adding 261 days for a Day 5 transfer or 263 days for a Day 3 transfer
- The Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD/NIH) provides educational content on IVF procedures and pregnancy
- The 280-day (40-week) gestational duration. from LMP is Naegele’s rule, the standard obstetric method for estimating due dates
These dating methods are widely accepted in reproductive medicine. However, first-trimester ultrasound remains the most accurate method for confirming gestational age, and your fertility clinic or obstetric provider should be your primary source for pregnancy dating.
How to Interpret Your Results
The calculator provides educational estimates of pregnancy dates based on the IVF transfer information you entered:
- Estimated Due Date. The calculated expected due date based on the estimated LMP plus 280 days (40 weeks). This is an estimate; actual delivery dates vary.
- Estimated LMP. The calculated last menstrual period date derived by subtracting the LMP offset from the transfer date. This is a calculated reference point for pregnancy dating.
- Estimated Conception Date. The estimated date of fertilization, calculated as the transfer date minus the embryo age in days.
- Gestational Age. The estimated current pregnancy duration in weeks and days, calculated from the estimated LMP to the current date.
Important:: These are educational estimates based on accepted formulas. Actual gestational age and due date are best determined by early ultrasound and clinical assessment by your fertility clinic and obstetric provider. The calculator does not confirm pregnancy, predict viability, or replace professional prenatal care.
When to consult a healthcare provider:: For accurate pregnancy dating, prenatal care, and any questions about your IVF pregnancy, consult your fertility clinic and obstetric provider.
Medical Disclaimer
The information provided by Qurekit's calculators is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or treatment. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.
Frequently Asked Questions
Medical References
- American College of Obstetricians and Gynecologists (ACOG): Methods for Estimating the Due Date
- Cleveland Clinic: Due Date Calculator: How Many Weeks Pregnant Are You?
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD/NIH): Assisted Reproductive Technology (ART)
- MedlinePlus (National Library of Medicine / NIH): Gestational age
- March of Dimes: Calculating Your Due Date
Related Tools
Version History
Every version is logged with its build date, changes, and evidence sources so you can verify the methodology.
Version v1.0.0
Initial Implementation
Initial implementation of the IVF Due Date Calculator. Estimates the expected due date after an IVF embryo transfer using accepted pregnancy dating formulas based on embryo transfer date and embryo age (Day 3, Day 5, or Day 6). Supports optional current date entry for estimated gestational age.
Changes
- Initial calculator implementation
- IVF pregnancy dating formulas: LMP offset (Day 3: 17 days, Day 5: 19 days, Day 6: 20 days), EDD = LMP + 280 days
- Embryo transfer date input with calendar date picker
- Embryo age selection (Day 3 / Day 5 / Day 6) with Day 5 as default
- Optional current date input for estimated current gestational age
- Transfer date validation (past dates only, up to 2 years back)
- Embryo age validation (Day 3, Day 5, or Day 6 only)
- Current date validation (cannot be future, cannot be before transfer)
- Educational due date estimate with disclaimer
- Pregnancy timeline visualization with LMP, conception, transfer, and due date markers
- Gestational age at transfer displayed
- Current gestational age estimate when current date is provided
- Medical references section with authoritative sources (ACOG, ASRM, SART, Cleveland Clinic, MedlinePlus)
- FAQ section with 6 educational questions
- Structured data (WebApplication, MedicalWebPage, FAQPage)
- BreadcrumbList JSON-LD for SEO
- Accessibility: keyboard navigation, aria-live, focus management
- Mobile-responsive layout
- Related tools carousel with cross-linking to fertile window and pregnancy weight gain calculators
Evidence Sources
- American College of Obstetricians and Gynecologists (ACOG)
- Cleveland Clinic
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD/NIH)
- MedlinePlus / National Library of Medicine (NIH)
- March of Dimes