What IVF is and why people choose it
In vitro fertilization (IVF) is a process where eggs are removed from your ovaries, mixed with sperm in a laboratory, and then placed back into your uterus as embryos. It is one option for people who want to become pregnant but face barriers like blocked fallopian tubes, low sperm count, endometriosis, or unexplained infertility. Some people also use IVF with a donor egg, donor sperm, or a gestational carrier.
IVF is not the only fertility treatment available. Depending on what is preventing pregnancy, your doctor might first suggest less invasive options like medication to trigger ovulation, intrauterine insemination (IUI), or surgery to remove scar tissue. IVF is typically recommended after those approaches have not worked, or when testing shows it is the most direct path to pregnancy.
The process takes about two to three weeks from start to embryo transfer, though the full timeline from your first appointment to a pregnancy test can stretch to several months. Cost varies widely by location and clinic, ranging from several thousand to over fifteen thousand dollars per cycle, and most insurance plans do not cover it.
Key Takeaways
- IVF involves removing eggs, fertilizing them with sperm in a lab, and transferring embryos into your uterus; the entire process from egg retrieval to transfer takes two to three weeks.
- Before IVF, you will take hormone medications for one to two weeks to stimulate your ovaries to produce multiple eggs instead of one.
- Egg retrieval is a minor surgical procedure done under sedation; sperm is collected on the same day or thawed if previously frozen.
- Not all fertilized eggs become viable embryos, and not all embryos result in pregnancy, so success rates depend on age, egg quality, and clinic experience.
- Cost per cycle ranges from several thousand to over fifteen thousand dollars, and most insurance does not cover it, though some employers or states offer partial coverage.
The hormone stimulation phase: preparing your ovaries
The first step is to suppress your natural menstrual cycle using birth control pills or a medication called a GnRH agonist or antagonist. This takes about one to two weeks and prevents your body from ovulating on its own before the clinic is ready to retrieve eggs.
Once your cycle is suppressed, you begin injecting gonadotropins — hormones that signal your ovaries to produce multiple eggs instead of the single egg your body normally releases. You inject these medications (usually follicle-stimulating hormone, or FSH) under your skin or into muscle, typically once or twice daily for eight to fourteen days. During this time, you will have blood tests and ultrasounds every few days so the clinic can monitor how many follicles (fluid-filled sacs containing eggs) are developing and adjust your dose if needed.
When the follicles reach the right size, usually around eighteen to twenty millimeters, you receive a final injection of human chorionic gonadotropin (hCG) to trigger the eggs to finish maturing. Egg retrieval happens thirty-four to thirty-six hours after this trigger injection — the timing is precise because the eggs must be retrieved before your body releases them naturally.
Egg retrieval and fertilization in the laboratory
Egg retrieval is an outpatient procedure lasting fifteen to twenty minutes. You receive sedation (not full anesthesia) and the doctor uses an ultrasound probe to guide a needle through your vaginal wall into each follicle, gently suctioning out the fluid and egg. Most people feel mild cramping or pressure but not sharp pain. You go home the same day, usually with someone driving you, and can return to light activity within a few days.
On the same day as retrieval, sperm is collected through masturbation or, if the person with sperm has a condition affecting sperm production or ejaculation, through a surgical procedure. If sperm was frozen in advance, it is thawed on retrieval day. The lab then counts and assesses the sperm to determine how many are healthy and mobile.
That evening or the next morning, the eggs and sperm are combined in a dish in the laboratory. In standard IVF, the sperm and eggs are placed together and fertilization happens naturally. In intracytoplasmic sperm injection (ICSI), a single sperm is injected directly into each egg — this is used when sperm count is very low or sperm motility is poor. The embryologist checks for fertilization the next day by looking for two pronuclei (the genetic material from egg and sperm) under a microscope.
Embryo development and testing before transfer
Fertilized eggs (now called embryos) are kept in an incubator that mimics the conditions inside a uterus. The embryo divides and grows over five to six days. On day three, the embryo typically has six to eight cells; by day five or six, it reaches the blastocyst stage, when it has a fluid-filled cavity and is ready to implant in the uterus.
Not all embryos develop normally. Some stop dividing, some divide unevenly, and some have chromosomal abnormalities. On average, about fifty to seventy percent of fertilized eggs become embryos suitable for transfer, though this varies based on age, egg quality, and sperm quality. The embryologist grades embryos based on appearance — a higher grade suggests better potential for pregnancy, but grading is not a perfect predictor of success.
Some clinics offer preimplantation genetic testing (PGT), which involves removing a few cells from the embryo and testing them for chromosomal abnormalities or specific genetic conditions. This adds several hundred to a few thousand dollars to the cycle cost and delays transfer by one to two weeks while results come back, but it can reduce the risk of miscarriage and increase the chance of pregnancy in people over thirty-five or those with a history of miscarriage. PGT is optional and not recommended for everyone.
Embryo transfer and the wait for pregnancy confirmation
Embryo transfer happens three to six days after egg retrieval, depending on whether you transfer on day three or day five and whether you chose genetic testing. The procedure is similar to a pap smear — the doctor uses a thin catheter to place the embryo into your uterus while you lie on an exam table. It takes a few minutes and most people feel little to no discomfort. You go home the same day and can resume normal activity when ready, though some clinics recommend taking it straightforward for a day or two.
After transfer, the embryo must implant into the uterine lining over the next seven to fourteen days. During this time, you may take progesterone (a hormone that helps the uterus support pregnancy) as a pill, injection, or vaginal suppository. You will not feel the embryo implanting, and there is no test that can confirm pregnancy before implantation is complete.
A pregnancy test (blood test measuring hCG) is done ten to fourteen days after transfer. If hCG is present and rising, you are pregnant. If it is negative, the cycle did not result in pregnancy. Some people have a chemical pregnancy, where hCG rises briefly but then falls — this is a very early miscarriage. Your doctor will discuss next steps, whether that is trying again with remaining frozen embryos, doing another fresh cycle, or exploring other options.
Success rates and factors that affect your chances
IVF success rates are reported as the percentage of cycles that result in a live birth. Rates vary significantly by age, clinic, and whether you are using your own eggs or donor eggs. The Society for Assisted Reproductive Technology (SART) publishes clinic-specific data on their website, broken down by age group and type of cycle.
Age is the single strongest predictor of success. For people under thirty-five using their own eggs, live birth rates per cycle are roughly thirty-five to fifty percent. For people thirty-five to thirty-seven, rates drop to twenty-five to thirty-five percent. For people thirty-eight to forty, rates are fifteen to twenty percent. For people over forty-two, rates fall below ten percent. These numbers reflect the fact that egg quality declines with age, leading to more chromosomal abnormalities and fewer viable embryos.
Other factors that affect success include sperm quality, uterine health, whether you have endometriosis or fibroids, how many embryos are transferred (transferring two increases pregnancy rate but also increases the risk of multiples), and clinic experience. Some clinics have higher success rates than others, partly because they serve different patient populations and partly because of differences in practice and informed.
Cost, insurance, and financial options
A single IVF cycle costs between five thousand and twenty thousand dollars depending on your location, the clinic, and what is included. The base cost typically covers the initial consultation, hormone medications, ultrasounds and blood tests during stimulation, egg retrieval, fertilization, embryo culture, and transfer. Additional costs may include genetic testing (five hundred to three thousand dollars), sperm freezing or thawing, anesthesia, and facility fees.
Most health insurance plans do not cover IVF, though a small number of employers and states mandate coverage. Check your plan documents or call your insurance company to ask whether IVF is covered and, if so, what percentage and whether there is an annual or lifetime limit. Some states (including New York, Illinois, and Maryland) require insurance companies to cover at least part of IVF; others do not.
If insurance does not cover it, you have several financial options. Some clinics offer payment plans or discounts for paying upfront. Fertility-specific financing companies offer loans with interest rates and terms you can choose. Some employers offer fertility benefits through a dependent care account or a dedicated fertility benefit. Grants from nonprofit organizations like RESOLVE exist but are competitive and limited. Some people save over time, use credit cards, borrow from family, or do multiple cycles over several years.
Frequently Asked Questions
What is the difference between IVF and IUI?
IUI (intrauterine insemination) places sperm directly into the uterus around the time of ovulation, but fertilization still happens inside your body. IVF removes eggs and fertilizes them outside the body, then transfers embryos back in. IUI is less invasive and less expensive (typically one thousand to three thousand dollars per cycle) but has lower success rates, especially for people over thirty-five or those with low sperm count or blocked tubes.
Can I do IVF if I have irregular periods or do not ovulate?
Yes. The hormone medications used in IVF stimulate your ovaries to produce eggs regardless of whether you ovulate naturally. People with polycystic ovary syndrome (PCOS), premature ovarian insufficiency (POI), or other conditions affecting ovulation can still do IVF, though the dose of medications may need adjustment and the number of eggs retrieved may vary.
What happens to embryos I do not transfer?
Embryos can be frozen and stored for future use. Frozen embryos remain viable for many years and can be thawed and transferred in a later cycle, which costs less than a fresh cycle (typically two thousand to five thousand dollars) because you skip hormone stimulation and egg retrieval. You can also donate frozen embryos to another person or couple, or choose to discard them. Your clinic will ask you to sign consent forms specifying what you want to happen to any frozen embryos.
Does IVF increase the risk of birth defects or cancer?
Large studies have not found that IVF increases the risk of birth defects in children born from IVF compared to children born naturally. The risk of ovarian cancer from fertility medications is very small and has not been clearly established in long-term studies. Discuss any specific concerns with your doctor, especially if you have a family history of cancer.
How many times can I do IVF?
There is no medical limit to how many cycles you can do. The decision is usually based on cost, emotional toll, and how long you want to pursue this path. Some people do one cycle, some do three to five, and some continue for years. Your doctor can help you think through whether continuing makes sense based on your age, egg quality, and previous results.