IVF Due Date Calculation
IVF pregnancies have a precisely known conception date, making due date calculation more accurate than LMP-based estimates. The embryo age at transfer is added to the transfer date, then 266 days (38 weeks) are added for the full gestational period.
Day 3 vs Day 5 Transfers
Day 3 embryos are at the cleavage stage (6-8 cells). Day 5-6 embryos are blastocysts (100+ cells). For dating purposes, a Day 5 blastocyst transfer is equivalent to 19 days past LMP (14 days + 5 days). Due date is calculated by adding 261 days to transfer date.
IVF Pregnancy Monitoring
Early ultrasounds confirm gestational age despite known transfer date. First trimester screening occurs at same gestational ages as natural pregnancies. Most IVF pregnancies proceed identically to natural conceptions after the first trimester.
Quick Tips
- BMI alone doesn't reflect overall health
- TDEE varies based on activity level
- Consult a healthcare professional for medical decisions
Frequently Asked Questions
After implantation, they're essentially the same. Slightly higher multiples rate with IVF.
Confirms expected development, identifies twins, detects any abnormalities.
Slightly, mainly due to maternal age and multiples, not IVF itself.
Yes, but transfer date + embryo age is more precise.
No, embryo age at transfer is what matters, regardless of how long it was frozen.