Calculate Your IUI Due Date
💡 IUI due date = IUI procedure date + 266 days (same as natural conception from ovulation, since IUI is performed around ovulation time).
💡 If you know the first day of your last period, we add 280 days to estimate your due date — the same as natural pregnancy dating.
💡 If you triggered ovulation with an hCG shot, use the trigger date + 1 day as your ovulation date. We add 266 days from ovulation to get your due date.
Your Estimated Due Date
—
— days to go
🧪
Beta hCG Test
—
~14 days after IUI
💗
First Heartbeat Scan
—
Around Week 6–7
🌸
1st Trimester Ends
—
Week 13
💙💗
Gender Scan
—
Around Week 18–20
⭐
Viability Milestone
—
Week 24
🤰
Full Term
—
Week 37
📅 Your Complete IUI Pregnancy Timeline
💉 IUI Procedure / Ovulation—
🌱 Implantation Window—
🧪 Beta hCG Blood Test—
💗 First Ultrasound (Heartbeat)—
🌸 End of First Trimester—
🎯 Anatomy Scan (20 weeks)—
⭐ Viability Milestone (24 weeks)—
🌺 End of Second Trimester—
🤰 Full Term (37 weeks)—
👶 Estimated Due Date (40 weeks)—
Pregnancy Progress
⚕️ Medical Disclaimer: This calculator provides an estimated due date only. Your actual due date may vary. Always confirm with your reproductive endocrinologist or OB-GYN, who will use ultrasound measurements to determine your official due date.
How Is an IUI Due Date Calculated?
IUI (intrauterine insemination) is performed at or just before ovulation, making the calculation straightforward: your due date is approximately 266 days (38 weeks) from your IUI procedure date — equivalent to 280 days from the first day of your last period.
This is the same formula used for natural conception, because IUI simply places sperm closer to the egg at the natural time of ovulation. Unlike IVF, where embryo age is precisely known, IUI dating follows standard pregnancy dating conventions.
💡 hCG trigger shot users: If you received an hCG trigger injection to time ovulation, your IUI was likely performed 24–36 hours after the injection. Use the day of your IUI (not the trigger shot day) as your base date for the most accurate calculation.
What Is IUI?
💉 Understanding Intrauterine Insemination
IUI is a fertility treatment where washed, concentrated sperm is placed directly into the uterus through a thin catheter during ovulation. It bypasses the cervix, giving sperm a shorter path to the egg and increasing the chances of fertilization.
1
Ovarian Monitoring
Ultrasounds track follicle development. Some cycles use oral medications (Clomid, Letrozole) or injectable gonadotropins to stimulate egg production.
2
Trigger Shot (Optional)
An hCG injection triggers final egg maturation and precisely times ovulation. IUI is typically performed 24–36 hours later.
3
Sperm Preparation
A semen sample is "washed" in the lab to concentrate the best-quality motile sperm and remove seminal fluid, which could cause uterine cramping.
4
The IUI Procedure
A thin, flexible catheter is passed through the cervix and sperm is deposited directly into the uterus. The procedure takes about 5–10 minutes and is usually painless or causes only mild cramping.
5
Two-Week Wait & Beta hCG Test
You wait 10–14 days before a blood test checks for hCG. A level above 5 mIU/mL confirms pregnancy. Progesterone suppositories are often prescribed during this period.
IUI Success Rates — What to Expect
| Situation | Success Rate Per Cycle | Notes |
|---|---|---|
| Unexplained infertility (under 35) | 10–20% | Often first line of treatment |
| Mild male factor | 10–17% | Improves with washed sperm count |
| Ovulation disorders (with meds) | 15–25% | Clomid or Letrozole improves outcomes |
| Cervical factor | 15–20% | IUI bypasses cervical mucus issues |
| Age 35–40 | 5–10% | Success rates decline with age |
| After 3–4 IUI cycles | 40–50% cumulative | Most pregnancies occur within 3–4 attempts |
IUI vs IVF — Key Differences
💉 IUI
- Less invasive — no egg retrieval
- Lower cost ($300–$1,500 per cycle)
- 10–20% success rate per cycle
- Natural or mildly stimulated cycle
- Best for: mild male factor, unexplained infertility, cervical issues
- Usually tried before IVF
🔬 IVF
- More invasive — egg retrieval required
- Higher cost ($12,000–$25,000 per cycle)
- 40–50% success rate per cycle (under 35)
- Heavy ovarian stimulation
- Best for: blocked tubes, severe male factor, failed IUI, older age
- Allows genetic testing of embryos
After a Positive IUI Pregnancy Test
🎉 What Happens Next
- Second beta hCG test (48 hours later): Your clinic will repeat the blood test to confirm hCG is doubling appropriately. A rise of at least 53% over 48 hours is reassuring.
- First ultrasound (~6–7 weeks): Confirms intrauterine pregnancy and checks for heartbeat. This is the most important early scan — it rules out ectopic pregnancy.
- Graduation from your fertility clinic (~8–10 weeks): Once a healthy heartbeat is confirmed, you typically "graduate" to your regular OB-GYN.
- First trimester screening (11–13 weeks): Nuchal translucency scan and blood tests to check chromosomal risk.
- Continue progesterone: Many IUI pregnancies involve progesterone support. Your doctor will advise when to stop — typically around 10–12 weeks.
💗 Feeling anxious after IUI? This is completely normal and extremely common. Many fertility patients experience significant anxiety even after a positive test. Lean on your support network and talk to your clinic about what to expect at each stage.
Frequently Asked Questions
Is the IUI due date the same as a natural pregnancy due date?
Yes — the calculation is identical. IUI is performed at or around ovulation, so the due date formula is the same: ovulation/IUI date + 266 days, or LMP + 280 days. Your OB-GYN will use ultrasound measurements at your first scan to confirm and may slightly adjust your due date based on baby's size.
When should I take a pregnancy test after IUI?
Wait at least 14 days after your IUI procedure before taking a home pregnancy test. Testing earlier risks a false positive from residual hCG trigger shot still in your system, or a false negative because hCG hasn't risen high enough yet. Your clinic will schedule an official beta hCG blood test around day 14.
How many IUI cycles should I try before moving to IVF?
Most reproductive endocrinologists recommend 3–4 IUI cycles before considering IVF, as cumulative success rates improve with each attempt and plateau around cycle 4. However this varies by age, diagnosis, and individual circumstances. Women over 38, or those with blocked tubes or severe male factor, may be advised to proceed to IVF sooner. Discuss your specific situation with your doctor.
Does IUI increase the chance of twins?
IUI alone (without fertility medications) does not significantly increase twin risk. However, if you used ovarian stimulation medications (Clomid, Letrozole, or injectable gonadotropins) with your IUI, the risk of multiples is higher — around 8–13% for twins with Clomid, and higher with injectables. Your doctor monitors follicle development to minimize this risk.
What is a good beta hCG level after IUI?
A beta hCG above 5 mIU/mL at 14 days post-IUI is considered positive. Levels above 50 mIU/mL at this stage are generally reassuring, though ranges vary widely between healthy pregnancies. What matters most is that the number doubles every 48–72 hours in the early weeks. Use our hCG Level Calculator to track your doubling time.
Is cramping after IUI normal?
Yes — mild cramping during and after the IUI procedure is very common and usually settles within a few hours. This is caused by the catheter passing through the cervix and the sperm being deposited in the uterus. Rest for the remainder of the day. Severe or persistent cramping, especially with fever, should be reported to your clinic immediately.