The main warning signs of infection after IUI include fever or chills, worsening or persistent pain in the lower belly or pelvis, unusual vaginal discharge, and abnormal bleeding. Infection after IUI is rare. Mild cramping or light spotting for a day or two can occur after the procedure, but symptoms that worsen or occur with fever should be reported to your fertility clinic promptly.
Intrauterine insemination (IUI) is a fertility procedure in which prepared sperm is placed directly into the uterus using a thin tube called a catheter. Although the procedure is generally low risk, it can occasionally lead to an infection. Knowing which symptoms need attention can help you seek care without confusing common, short-lived aftereffects with possible complications.
What are the warning signs of infection after IUI?
The Women & Infants Fertility Center identifies fever, chills, pelvic pain, and foul-smelling vaginal discharge as potential signs of infection after IUI. Other changes, including unusual bleeding or urinary discomfort, may also need medical assessment.
- Fever or chills: A raised temperature or feeling unusually cold and shivery can occur with an infection.
- Persistent or worsening pelvic pain: Pain in the lower abdomen or pelvis that becomes stronger, does not settle, or feels different from the brief cramping expected after the procedure needs attention.
- Unusual vaginal discharge: Discharge that develops a strong, unpleasant smell or changes noticeably in appearance may indicate an infection.
- Unexpected vaginal bleeding: Bleeding that is unusual for you, becomes heavier, or occurs with pelvic pain or fever should be discussed with a healthcare professional.
- Burning during urination: Discomfort when passing urine can occur with urinary or reproductive tract problems and should be reported if it develops after IUI.
- Pain during sexual intercourse: New pain during sex, particularly when accompanied by pelvic discomfort or unusual discharge, warrants assessment.
These symptoms are examples of changes that deserve attention, not a checklist for diagnosing an infection. Some infections affecting the reproductive organs can produce mild or unclear symptoms. The US Centers for Disease Control and Prevention (CDC) lists lower abdominal pain, fever, unusual foul-smelling vaginal discharge, urinary burning, and bleeding between periods among possible signs of pelvic inflammatory disease, an infection involving the reproductive organs.
Which symptoms are normal after IUI, and which are concerning?
Some temporary discomfort is expected after insemination. According to Cleveland Clinic, mild cramping and light spotting for one or two days can occur after IUI. These effects often settle without treatment and do not automatically mean that an infection has developed.
The pattern of symptoms matters. Brief, mild cramping that improves is different from pain that becomes more intense or continues to interfere with normal activities. Light spotting is also different from unexpected or increasingly heavy bleeding. Fever, chills, or discharge with an unpleasant smell are not typical effects to dismiss as routine recovery.
If you are unsure whether a symptom is expected, contact your fertility clinic and describe what you are experiencing. You do not need to wait until several symptoms appear together before seeking advice.
When should you contact your fertility clinic?
Contact your fertility clinic or treating healthcare professional promptly if you develop a fever, chills, persistent or worsening pelvic pain, abnormal bleeding, or unusual vaginal discharge after IUI. The University of Iowa Health Care advises patients to contact their provider right away for pain, abnormal bleeding, fever, or abnormal discharge following insemination.
When you call, explain when the procedure took place, when the symptoms began, whether they are getting better or worse, and whether you have measured a fever. Also mention any fertility medications you are taking and any recent urinary or vaginal symptoms. This information can help the care team decide how urgently you need an examination.
Seek urgent medical care if you develop severe or rapidly worsening abdominal or pelvic pain, heavy bleeding, fainting, or feel seriously unwell. Do not delay emergency assessment while waiting for a response from the fertility clinic. If you are taking fertility medication and experience chest pain or difficulty breathing, seek emergency care because these can be signs of a serious treatment-related complication.
Can symptoms after IUI have causes other than infection?
Yes. Not every episode of pelvic discomfort or abdominal swelling after IUI is caused by infection. Mild cramping and spotting can follow the procedure itself, while fertility medications may cause other side effects. For people receiving medicines to stimulate the ovaries, abdominal pain and bloating, nausea or vomiting, and feeling faint can be warning signs of ovarian hyperstimulation syndrome (OHSS), a separate complication of fertility treatment.
The UK National Health Service (NHS) recommends urgent advice for people using ovulation-stimulating medication who develop abdominal pain and bloating, sickness, or faintness. These symptoms should not automatically be attributed to infection. Your healthcare team can assess the timing of your symptoms, medication use, medical history, and examination findings to determine what evaluation is appropriate.
What can you do to prepare for a medical assessment?
If you report possible infection symptoms, your healthcare professional may review your symptoms and medical history and examine you as needed. Depending on the findings, they may recommend tests to look for infection or investigate another cause of the symptoms. If an infection is suspected, follow the prescribed treatment plan rather than using leftover antibiotics or starting vaginal medicines without clinical guidance.
Before an IUI cycle, tell your fertility team about any current fever, unusual vaginal discharge, urinary discomfort, known sexually transmitted infection, or previous pelvic infection. Cleveland Clinic's IUI guidance includes screening for sexually transmitted and other infectious diseases among the evaluations that may be performed before treatment. Your clinic can determine whether further assessment or testing is appropriate before proceeding.
Infection after IUI is uncommon, and experiencing a symptom does not necessarily mean a complication has occurred. The important step is to recognize changes that need medical attention, report them promptly, and follow your fertility team's instructions.