IVF eligibility depends on a combination of medical diagnosis, age, how long you’ve been trying to conceive, and sometimes insurance or clinic-specific requirements like BMI. There’s no single checklist that applies everywhere, but the criteria fall into predictable categories that most clinics and insurers follow.
The Standard Infertility Timeline
The most common gateway to IVF is a clinical diagnosis of infertility, which is defined by how long you’ve been trying to get pregnant without success. If you’re under 35, the standard threshold is 12 months of regular, unprotected intercourse. If you’re between 35 and 40, that window shortens to six months. And if you’re over 40 or have a known risk factor for infertility, guidelines recommend starting evaluation and treatment right away.
These timelines aren’t arbitrary. Fertility declines meaningfully after 35, and the success rates of any treatment, including IVF, drop with age. Starting the workup sooner gives you more options.
Medical Conditions That Lead to IVF
Certain diagnoses make IVF the most effective or only realistic path to pregnancy. Blocked or damaged fallopian tubes are one of the clearest examples. When eggs can’t travel from the ovary to the uterus naturally, IVF bypasses the tubes entirely. Severe endometriosis, where tissue similar to the uterine lining grows outside the uterus and causes scarring, is another common reason.
Polycystic ovary syndrome (PCOS) is the most common cause of ovulation problems, affecting up to 80% of women with the condition. Most women with PCOS start with less intensive treatments like ovulation-inducing medications, sometimes paired with intrauterine insemination (IUI). IVF typically enters the picture when those approaches haven’t worked.
Unexplained infertility, where standard testing doesn’t reveal a clear cause, also leads many couples to IVF after exhausting simpler options. The same is true for conditions like diminished ovarian reserve, recurrent miscarriage, or genetic conditions where embryo screening before transfer can reduce the risk of passing on a disorder.
Male Factor Infertility
IVF isn’t only about the person carrying the pregnancy. Severe male factor infertility is actually a first-line indication for IVF, particularly when combined with a technique called ICSI, where a single sperm is injected directly into an egg. The World Health Organization defines normal semen parameters as a sperm concentration of at least 15 million per milliliter, total motility of 40% or higher, and at least 4% normal forms. When sperm counts fall well below those thresholds, particularly under 5 million per milliliter, or when sperm must be surgically retrieved due to a blockage or absence of sperm in the ejaculate, IVF with ICSI is typically the recommended route.
Failed fertilization in a prior IVF cycle is another reason ICSI might be added. For couples where the male partner has borderline numbers, a fertility specialist can help determine whether IUI is worth trying first or whether going straight to IVF makes more sense given the full clinical picture.
Age and Ovarian Reserve
Age is the single strongest predictor of IVF success, and clinics assess it alongside ovarian reserve testing. These blood tests measure hormones that reflect how many eggs you have remaining. An AMH (anti-Müllerian hormone) level below 1 nanogram per milliliter suggests a declining egg supply, though it doesn’t definitively predict whether you can get pregnant. Results vary between labs, so your doctor interprets them in context with your age and other factors.
Most clinics don’t set a hard upper age limit for IVF with your own eggs, but success rates decline steeply after 40 and become very low after 43 or 44. Using donor eggs changes the equation significantly. Because success tracks with the egg donor’s age rather than the recipient’s, women in their 40s and even 50s using donor eggs can see live birth rates as high as 50% per cycle, with cumulative rates of 60 to 80% over multiple cycles. Egg donors are typically between 21 and 30 years old, with known or directed donors allowed up to 35.
BMI and Lifestyle Requirements
Many fertility clinics set BMI limits for IVF, and this is one of the most variable criteria from clinic to clinic. A BMI of 40 or above is a common cutoff where clinics decline to proceed, largely because of anesthesia risks during egg retrieval. Only a handful of centers in the U.S. offer IVF to patients with BMIs up to 60, and those are typically at large academic hospitals with specialized anesthesia teams. At these centers, patients with a BMI over 40 are required to consult with a maternal-fetal medicine specialist before treatment and are encouraged to transfer only a single embryo to reduce the risks of a multiple pregnancy.
Smoking is another factor. Cigarette smoking reduces sperm concentration, motility, and morphology in men, and in women it can physically alter the outer shell of the egg, making fertilization harder. Women who smoke also tend to reach menopause one to four years earlier. Most clinics require or strongly recommend quitting before starting a cycle. There’s good reason to follow through: research shows that for every additional year after quitting, the risk of IVF failure drops by about 4%, particularly between achieving a pregnancy and delivering a live baby. Secondhand smoke exposure also affects outcomes.
Single People and Same-Sex Couples
You do not need to be married or in a heterosexual relationship to qualify for IVF. The American Society for Reproductive Medicine’s ethics guidelines state that fertility programs should treat all patients equally regardless of marital status, sexual orientation, or gender identity. In some states, antidiscrimination laws specifically prohibit clinics from denying assisted reproductive services based on sexual orientation.
The only basis on which a clinic can deny services is a serious, well-substantiated concern about a patient’s ability to provide safe care for a child, and that standard applies equally to all patients regardless of relationship status. In practice, single individuals and same-sex couples access IVF routinely, often using donor sperm, donor eggs, or gestational carriers depending on their needs. Not every clinic offers every service, so availability of donor or carrier programs can vary.
What Insurance Requires
If you’re relying on insurance to cover IVF, the qualification criteria are often stricter than what a clinic alone would require. In states with fertility insurance mandates, the most common prerequisite is that you’ve tried and failed less expensive treatments first. This typically means completing a certain number of IUI cycles or rounds of ovulation induction before IVF will be approved. Some state laws cap this at no more than three cycles of IUI or ovulation induction before IVF coverage kicks in.
The exact language varies by state. Some require that your doctor document that less costly treatments are unlikely to succeed before authorizing IVF. Others require you to attest that you’ve been unable to achieve a successful pregnancy through any less expensive treatment covered under your plan. A handful of states mandate IVF coverage broadly, while many others have no fertility coverage mandate at all. RESOLVE, the National Infertility Association, maintains a state-by-state breakdown of these laws that’s worth checking before you start treatment.
Pre-Treatment Screening
Before starting an IVF cycle, clinics run a series of diagnostic tests to confirm you’re a good candidate and to plan your protocol. For the person carrying the pregnancy, this typically includes ovarian reserve blood work, an imaging test to evaluate the uterus and fallopian tubes, and sometimes a procedure that uses fluid and ultrasound to get a detailed look at the uterine lining. These tests check for structural issues like polyps, fibroids, or scarring that could interfere with embryo implantation. For the male partner, a semen analysis is standard. Infectious disease screening for both partners is required by federal regulation before using any reproductive tissue in the lab.
These tests aren’t barriers to IVF so much as they are the map your doctor uses to design your treatment. Finding a uterine polyp, for example, doesn’t disqualify you. It just means removing it before transferring an embryo.