1. What is the Post Transplant Date Calculator?

The Post Transplant Date Calculator estimates the due date for pregnancies resulting from IVF embryo transfer. It accounts for the embryo's age at transfer to provide a more accurate due date than standard pregnancy calculators.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• Transfer Date — Date of embryo transfer
• 266 — Standard length of pregnancy (38 weeks) in days
• Embryo Age — Age of embryo at transfer in days

Explanation: The calculation adjusts for the embryo's development prior to transfer, providing a more accurate due date than counting from the last menstrual period.

3. Importance of Accurate Due Date Calculation

Details: An accurate due date is crucial for proper prenatal care, timing of tests, and planning for delivery. IVF pregnancies benefit from this precise calculation method.

4. Using the Calculator

Tips: Enter the exact transfer date and embryo age in days (typically 3 for day-3 embryos or 5 for day-5 blastocysts). The calculator will determine the estimated due date.

5. Frequently Asked Questions (FAQ)

Q1: Why 266 days instead of 280?
A: 280 days (40 weeks) counts from last menstrual period. 266 days (38 weeks) counts from conception/fertilization, which is more precise for IVF pregnancies.

Q2: What embryo age should I use?
A: Typically 3 days for day-3 embryos or 5 days for day-5 blastocysts. Consult your fertility specialist for your specific case.

Q3: How accurate is this calculation?
A: Very accurate for IVF pregnancies as it's based on known dates. More precise than ultrasound dating in early pregnancy.

Q4: Does this work for frozen embryo transfers?
A: Yes, the same calculation applies regardless of whether the embryo was fresh or frozen at transfer.

Q5: Should I still get dating ultrasounds?
A: While this method is accurate, ultrasounds are still important to confirm fetal development and growth.