The IVF process, step by step
What actually happens in a cycle, in order, and how long each part really takes. From the first injection to the pregnancy test, with every stage cited and linked to what it costs and how well it works.
One fresh IVF cycle takes about 4 to 6 weeks from the first injection to the pregnancy test: 8–14 days of stimulation, egg retrieval 34–36 hours after the trigger shot, a few days of embryo growth in the lab, the transfer, then a roughly two-week wait for the blood test. A frozen transfer or genetic testing splits it across two cycles.
Each step below links to what it costs, the drugs involved, or the odds it carries, so you can read the process and the price together instead of on separate pages.
One cycle, in order
The path a fresh cycle follows. A frozen transfer or PGT-A moves the transfer to a later cycle (see below).
Ovarian stimulation
8 to 14 daysDaily injections of hormone medication (gonadotropins) push the ovaries to ripen many eggs in one cycle instead of the single egg a natural month would produce.
You self-administer the shots at home, and the clinic monitors you with a transvaginal ultrasound and an estradiol blood test every couple of days to track how the follicles are growing and adjust the dose.
The trigger shot
One shot, 34 to 36 hours before retrievalWhen the lead follicles are large enough, a single precisely timed trigger injection finishes maturing the eggs and loosens them for collection.
The timing is exact: egg retrieval is scheduled 34 to 36 hours later, before the body would release the eggs on its own. Miss the window and the cycle can be lost.
Egg retrieval
About 30 minutesA short outpatient procedure under light sedation. Guided by ultrasound, a thin needle passes through the vaginal wall to draw the fluid, and the eggs, from each follicle.
You are sedated, not under general anesthesia, and go home the same day. Cramping and spotting afterward are normal. The number of eggs collected depends on your ovarian reserve.
Fertilization
Same day, checked the next morningIn the lab, each mature egg is fertilized, either by mixing it with prepared sperm (conventional IVF) or by injecting a single sperm directly into the egg (ICSI).
About 60% of US IVF uses ICSI. It is designed for male-factor infertility and is worth questioning when that is not the diagnosis, because it adds cost without adding benefit for everyone.
Embryo growth and grading
3 to 6 days in the labThe fertilized eggs grow in the incubator. Most clinics now culture to day 5 or 6, when a healthy embryo becomes a blastocyst, and grade each one on how it looks.
Grading (see below) ranks embryos by appearance to choose which to transfer first. It predicts implantation on average, but it does not tell you whether an embryo is chromosomally normal.
Genetic testing (optional)Optional
Adds about 1 to 2 weeksIf you choose PGT-A, a few cells are biopsied from each blastocyst and sent for chromosome screening. The embryos are frozen while you wait for results.
Because the embryos are frozen to wait for results, a PGT-A cycle is almost always a freeze-all: the transfer happens in a later prepared cycle, not this one.
Embryo transfer
1 to 6 days after retrieval (fresh), or a later cycle (frozen)A quick, usually painless procedure with no sedation: a thin catheter places one embryo (occasionally more) into the uterus through the cervix.
A fresh transfer happens in the same cycle as the retrieval. A frozen transfer, now the more common choice, happens in a separate prepared cycle weeks later.
The wait, and the pregnancy test
A blood test about 9 to 14 days after transferThe embryo should implant in the uterine lining roughly 6 to 10 days after retrieval. A blood test measuring hCG, not a home urine test, confirms whether the cycle worked.
This is the two-week wait. Progesterone support continues throughout it. A blood hCG test is used because it is accurate earlier and quantitatively, where a home test can mislead.
About four to six weeks, for one fresh cycle
Add up the stages and a single fresh cycle runs roughly a month and a half from the first injection to the test.
A fresh cycle is about 4 to 6 weeks end to end. That figure is the sum of the stages above, not a single quoted number, and it moves with how your body responds to stimulation.
A fresh transfer keeps everything in one four-to-six-week cycle. A frozen transfer, and any cycle with PGT-A genetic testing, splits it in two: the retrieval happens now, and the embryos are frozen and transferred in a separate prepared cycle a few weeks later, which is why a freeze-all plan takes longer overall but is often chosen for better timing and control.
Most families also need more than one cycle, so the calendar that matters is rarely a single pass. See how many cycles it usually takes and what that totals, and the live-birth odds by age that decide it.
What a grade like 4AA means
On day 5 or 6, each blastocyst is graded on how it looks. Here is how to read the grade, and why it is not the whole story.
Expansion (the number, 1 to 6)
1 to 6How far the blastocyst has grown and started to hatch, from 1 (early) to 6 (fully hatched out of its shell). Higher means more developed at the moment it was graded.
Inner cell mass (the first letter, A to C)
A to CThe cluster of cells that becomes the baby. A is many, tightly packed cells; C is very few. This is the axis that matters most.
Trophectoderm (the second letter, A to C)
A to CThe outer ring of cells that becomes the placenta. A is many cells forming a smooth layer; C is very few, large cells.
A higher grade has a higher average implantation rate, but grading judges how an embryo LOOKS, not its genetics. A top-graded embryo can be chromosomally abnormal, and a lower-graded one can be normal and become a healthy baby, which is the whole reason genetic testing (PGT-A) exists as a separate step.
Grading uses the Gardner blastocyst system, the standard most labs follow. Embryo culture and transfer are described by ASRM ReproductiveFacts, In Vitro Fertilization (IVF).
Common questions about the IVF process
How long does IVF take?
About 4 to 6 weeks for one fresh cycle, measured from the first stimulation injection to the pregnancy test. That breaks down as 8 to 14 days of stimulation, egg retrieval 34 to 36 hours after the trigger shot, 3 to 6 days of embryo growth in the lab, the transfer, and then a roughly two-week wait for the blood test. A frozen transfer or a cycle with PGT-A genetic testing takes longer overall, because the embryos are frozen and transferred in a separate prepared cycle a few weeks later.
What are the steps of IVF?
An IVF cycle runs in 7 core steps: (1) ovarian stimulation, daily hormone injections that ripen many eggs; (2) a timed trigger shot; (3) egg retrieval, a short sedated procedure; (4) fertilization in the lab, by conventional IVF or ICSI; (5) embryo growth and grading over 3 to 6 days; (6) the embryo transfer; and (7) the two-week wait ending in a blood pregnancy test. An optional genetic-testing step (PGT-A) sits between growth and transfer and moves the transfer to a later cycle.
Does egg retrieval hurt?
It is done under light sedation, not general anesthesia, and takes about 30 minutes as a same-day outpatient procedure. You are asleep for it and feel nothing during the retrieval itself. Afterward, cramping and light spotting are normal for a day or two. It is the eggs from each follicle being drawn out with a thin ultrasound-guided needle, not surgery.
What does an embryo grade like 4AA mean?
It is the Gardner system, three judgements in one: a number (1 to 6) for how expanded the blastocyst is, then two letters (A to C) for the inner cell mass, which becomes the baby, and the trophectoderm, which becomes the placenta. So 4AA is a well-expanded blastocyst with top-quality cell groups. But grading judges how an embryo looks, not its genetics: a top-graded embryo can be chromosomally abnormal and a lower-graded one can be perfectly normal, which is exactly why PGT-A genetic testing is a separate step.
What is the two-week wait?
It is the stretch between the embryo transfer and the pregnancy test. The embryo should implant in the uterine lining about 6 to 10 days after the egg retrieval, and a blood test measuring hCG is done roughly 9 to 14 days after the transfer to confirm the result. Progesterone support continues through the wait. A blood test is used rather than a home urine test because it is accurate earlier and gives an actual number.
What is the difference between IVF and ICSI?
In conventional IVF the eggs and prepared sperm are mixed in a dish and fertilization happens on its own. In ICSI a single sperm is injected directly into each egg. About 60% of US IVF now uses ICSI. It was designed for male-factor infertility, and when that is not the diagnosis it adds cost without adding benefit for everyone, so it is worth asking your clinic why it is recommended.
The process, priced and predicted
The base cycle, medications, and every add-on (ICSI, PGT-A, freezing) itemized and cited.
The live-birth odds each cycle carries, from the CDC's national data, by age band.
Toggle the parts of your own plan and see the all-in cost across the cycles you plan for.