Keys to a Successful IUI: Tips to Increase Your Chances of Pregnancy

Intrauterine insemination (IUI) is a fertility treatment that involves placing sperm directly into the uterus using a catheter to increase the chances of fertilization and pregnancy.

IUI is a relatively simple procedure that can result in pregnancy for couples experiencing infertility. The objective of IUI is to increase the number of moving (or motile) sperm that reach an egg, leading to fertilization. It is often the first-line approach for couples seeking assisted reproductive treatment. Unlike IVF, IUI does not require the collection of eggs from the ovaries or fertilization outside of the body.

Who can benefit from IUI?

Fertility specialists often consider IUI the first line of treatment for unexplained infertility, mild male factor infertility, or in combination with ovulation induction medications in patients who do not ovulate regularly (such as PCOS). Intrauterine insemination can help a couple if:

• A male partner’s sperm analysis indicates minor abnormalities. Sperm processing for IUI treatment helps optimize the sperm sample.

• A female partner has problems ovulating and has not been able to conceive using ovulation-inducing medication timed with home intercourse. Fertility medications that increase the number of eggs released during ovulation can help improve pregnancy rates with IUI.

• A couple has not successfully achieved pregnancy despite regular ovulation, open fallopian tubes, and normal sperm counts (unexplained infertility).

• A male partner has stored frozen sperm due to distance or timing issues.

• A male partner has erectile dysfunction or difficulty ejaculating.

• Donor sperm is being used to get pregnant. 

How is the IUI procedure performed?

IUI treatment is relatively simple and painless. Here are a few important things to know about IUI:

• A patient’s ovulation is monitored. This is usually done with ultrasounds and blood tests. This can either be a natural cycle, using a patient’s own ovulation, or ovulation induction, using fertility medications to support ovulation.

• IUI is done on an outpatient basis on the day of ovulation.

• The patient’s partner provides a semen sample. The semen sample is collected into a sterile container either at home or in the clinic. If frozen donor sperm is being used, it is thawed that day. 

• The andrology laboratory processes the semen sample to remove debris and non-moving, poor quality sperm, resulting in a final sample with highly motile sperm.

• The selected sperm are placed into a catheter. The catheter is a thin, flexible tube that is gently inserted into the uterus through the cervix, often with ultrasound guidance

• The sperm is then injected into the uterus. This process is usually painless and only takes a few minutes.

• The patient is immediately able to resume normal daily activities.

Timing IUI for successful insemination

It’s important to accurately time IUI when the egg has ovulated into the fallopian tube to achieve successful insemination. IUI can be done either in a natural cycle or using fertility medications to encourage ovulation, known as ovulation induction. 

The timing of ovulation can be predicted using ultrasound evaluation, blood tests, or at-home ovulation predictor kits (OPKs). OPKs detect the surge of luteinizing hormone (LH) that causes ovulation. When an OPK test is positive, the insemination is typically scheduled the next day. 

Alternatively, an ovulation trigger (hCG, human chorionic gonadotropin) can be used to more precisely time insemination. When the growing follicle(s) reach a certain size, the trigger injection is given to induce egg maturation and ovulation. The IUI is then performed approximately 24 to 36 hours after the trigger is administered.

IUI success rates

For IUI to be successful, a semen sample must have enough sperm to remain after the washing process. The chosen sperm will be placed inside the uterus, bypassing the cervical mucus barrier that can sometimes be a factor in infertility. However, they will still have to swim into the fallopian tubes.

On the female side, the egg needs to make it from the ovary into the fallopian tube successfully.

The sperm need to meet the egg in the fallopian tube, where fertilization occurs. The fertilized embryo then travels back down the fallopian tube into the uterus for successful implantation. 

The success rate of IUI depends on several factors

• Female factors such as age, ovarian function including egg number and egg quality, reproductive health, and any conditions such as fallopian tube blockage, endometriosis, uterine abnormalities, or other related factors.

• Male factors such as sperm counts and quality. A higher number of moving sperm increases the chance of pregnancy.

• The timing of insemination, which is typically planned for the day of ovulation.

The average chance of pregnancy with each IUI cycle is about 10–20%, although this varies depending on the individual factors listed above. For comparison, a young couple without fertility challenges has about a 20–25% chance of conceiving each month.

Many patients who are successful with IUI become pregnant within the first three to four treatment cycles. After several cycles, pregnancy rates may begin to decline. For this reason, your fertility specialist may recommend scheduling a follow-up visit after a few cycles to review your progress and discuss whether continuing IUI or considering other treatment options makes the most sense for you.

Tips for women and men before an IUI treatment

While the success rates of IUI vary depending on individual factors, there are several things you can do leading up to an IUI cycle to increase your chances of pregnancy:

• Regular checkups with your doctor to monitor your overall health and discuss any health concerns. It is important to make sure that you are in good overall health before attempting pregnancy.

• Avoid smoking and excessive alcohol consumption. Smoking and excessive alcohol consumption can damage sperm and eggs, and can reduce your chances of success during the IUI process. 

• Maintain a healthy weight. Being overweight or obese can affect ovulation and sperm production, and can reduce your chances of success with IUI.

• Eat a healthy diet. Eating a healthy diet can support both your overall health and fertility. Aim to include plenty of fruits, vegetables, and whole grains, with an emphasis on minimally processed foods. It can also be helpful to incorporate foods rich in antioxidants and omega-3 fatty acids, which may support reproductive health.

• Get regular exercise. Moderate exercise can benefit your overall health, fertility, and mental well-being.

• Manage stress. Stress can affect your hormones and can reduce your chances of success with IUI. Find healthy ways to manage stress, such as yoga, meditation, or spending time in nature.

• Choose a highly reputable fertility clinic and fertility specialist. It is important to do your research and choose a reputable fertility clinic and specialist with a good track record of success. A fertility specialist will be able to assess your individual situation, unique health history, unique fertility challenges and goals, and recommend the best course of treatment for you.

• For female patients, follow your fertility specialist’s instructions closely. Your doctor will give you specific instructions on how to prepare for your IUI, such as when to take medications, the timing of the trigger injection, and when to abstain from sexual intercourse. Be sure to follow these instructions carefully and ask questions if anything is unclear.

• For male patients, follow your fertility specialist’s instructions for producing your sperm sample carefully. This will increase your chances of providing viable sperm for insemination

Don’t hesitate to ask your doctor anything you would like to know about IUI. It can be helpful to come to your appointment with a list of questions. The more informed you are, the better equipped you will be to make decisions about your fertility journey.

What to do after the IUI procedure to increase the chances of pregnancy

• Continue to follow your fertility specialist’s instructions. Your doctor will continue to monitor your progress after your IUI treatment. Be sure to follow their instructions and keep your regularly scheduled appointments.

• Relax. The good news about an IUI procedure is that there are no restrictions as to what you can or cannot do after the treatment. You can have intercourse, exercise, and go about your daily routines.

• Rest. Getting plenty of rest can help improve your overall health and fertility. Avoid caffeine and alcohol, and get 7-8 hours of sleep per night.

• Test for pregnancy 14 days after your IUI. This is when you are most likely to get a positive pregnancy test. Testing earlier can lead to false negative results.

• Be patient. IUI cycles can take multiple attempts to be successful. Don’t get discouraged if you don’t get pregnant the first time. Many couples need to try IUI several times before they become pregnant.

What can a couple do if IUI is not successful

If a couple is not pregnant after three IUI cycles, the reason may include:

• The sperm and egg are not finding each other

• The eggs and sperm are not interacting appropriately to achieve a fertilized embryo

• The fertilized embryo is not able to get to the uterus for implantation

If a pregnancy does not occur, a fertility specialist can explore other fertility treatments such as INVOcell or IVF (in vitro fertilization).

You can learn more about the differences between IUI and IVF in this IUI vs. IVF comparison or from the Society for Assisted Reproductive Technology.

If you have questions about IUI or other fertility treatments, Atlantic Fertility in Raleigh, NC is here to provide the highest level of personalized fertility care. Contact us to schedule a preconception counseling appointment with one of our experts.

FAQs about IUI procedures

How long should the male partner abstain from ejaculation before providing a sperm sample for an IUI procedure?

In general, we recommend an abstinence period of 2 to 5 days before the sperm sample is collected for IUI. This can usually be achieved by ejaculating about 2–3 times per week leading up to and during the cycle.

If an ovulation trigger shot is used, ejaculation on the evening of the trigger is often recommended, followed by skipping ejaculation the day before the sperm collection. This approach helps ensure an optimal sperm sample for the IUI procedure.

Is there any benefit to doing a double IUI (two inseminations in the same cycle)?

In most cases, studies have not shown a clear benefit to performing two inseminations during the same cycle compared with a single IUI. Double IUIs are typically done on back-to-back days, which can sometimes result in a lower-quality sperm sample for the second insemination due to the short abstinence interval. For this reason, a single well-timed IUI is generally recommended.

What shouldn’t I do after an IUI procedure? 

Bed rest is not necessary. You don’t need to lie down or elevate your legs after the procedure. Studies show sperm reach the fallopian tubes within minutes.

There aren’t any major activity restrictions, either. In fact, moderate exercise and your usual daily routines are safe and encouraged.

Do avoid early pregnancy testing. If you used an HCG trigger, it can remain in your system and show a positive on a home pregnancy test for up to 10–12 days. On the other hand, testing too early may give a false negative if your HCG hasn’t reached detectable levels yet. For the most accurate result, wait the full 14 days before testing.