IUI Due Date Calculator
Had an IUI procedure? Enter the date to calculate your estimated due date, gestational age, and full pregnancy timeline.
Calculate Due Date from IUI Date
Enter the date of your IUI procedure to calculate your estimated due date. IUI is timed to ovulation, so we use the IUI date as the conception date.
Enter the date of your insemination procedure. If you had multiple IUI cycles, use the most recent successful one.
IUI Pregnancy Dating Guide
Intrauterine insemination (IUI) is one of the most commonly used fertility treatments, and calculating an IUI due date is straightforward because IUI is always timed to ovulation. Whether your clinic triggered ovulation with an hCG injection or timed the procedure to your natural LH surge, the IUI occurs at or very close to the time of ovulation. This means the IUI date is a reliable proxy for the conception date.
Our IUI due date calculator uses the formula EDD = IUI Date + 266 days, which is the same 266-day count from conception (ovulation) to full-term delivery used by fertility specialists. The result is your estimated due date along with a complete pregnancy timeline including milestones, baby development, and planning dates.
IUI vs Natural Conception Dating
In natural conception, ovulation day is often estimated. With IUI, the procedure is scheduled precisely around ovulation, making the date known. This slight advantage in precision means your IUI-based due date is often more accurate than an LMP-based estimate, particularly if your cycles are irregular. Your clinic may confirm the due date with an early ultrasound at 6–8 weeks gestational age.
The IUI Timeline
Start of cycle, baseline monitoring
Follicle monitoring via ultrasound
hCG shot to trigger ovulation
Insemination 24–36h after trigger
Beta hCG pregnancy test
After a Positive IUI Test
After a positive beta hCG, clinics usually repeat bloodwork in 48 hours to assess early hormone rise, then schedule a first viability ultrasound around 6–7 weeks gestational age. At that scan, the crown-rump length and heartbeat help confirm dating and ongoing development.
Keep in mind that mild cramping, fatigue, and breast tenderness are common in early pregnancy and can overlap with progesterone side effects if you are using luteal support. Use this due date as your planning timeline, and follow your fertility clinic or OB team for personalized medication and follow-up instructions.
Frequently Asked Questions
Common questions answered by our medical team