IVF Treatment Procedure: Every Stage from Stimulation to Transfer

Most couples arrive at IVF having already spent a year or two on something else. By the time it is suggested, they have had the tests, tried the timed cycles, perhaps done a round or two of IUI. And then they are handed a word that covers about six weeks of work, and told very little about what is inside it.

IVF is not one procedure. It is a sequence, and each stage has a purpose, a rough duration, and a point at which it can be stopped or adjusted. Knowing the shape of it is the difference between six weeks of anxiety and six weeks of following a plan.

Here is the whole sequence, in order.

Before the cycle starts: the tests that come first

Nothing begins until both partners have been assessed. This part gets rushed more often than it should, and it is the part that determines whether IVF is the right route at all.

For the woman, that usually means ovarian reserve testing AMH and an antral follicle count, a hormone panel, and an assessment of the uterine cavity. For the man, a semen analysis, and where the results warrant it, further testing of sperm function rather than simply sperm numbers.

That second point matters more than it is usually given credit for. A conventional semen analysis counts sperm and watches them move. It does not tell you whether the DNA inside them is intact. Where there is a history of failed cycles or unexplained poor fertilisation, that is worth knowing before you start rather than after.

Both partners also have infectious screening, which is a regulatory requirement rather than a clinical judgement.

Stage 1 — Ovarian stimulation

In a natural month, one follicle matures and releases one egg. IVF works on numbers, so the first job is to persuade the ovaries to mature several at once.

This is done with daily injections of follicle-stimulating hormone, usually self-administered at home after being shown how. Most people find the injections far less difficult than they expected. They are subcutaneous, into the abdomen, with a very fine needle.

Roughly 8 to 12 days, though the exact protocol varies.

Some patients are started on medication in the cycle before, to suppress the body’s own hormonal timing; others begin with stimulation directly and have suppression added partway through. Which protocol suits you depends on your ovarian reserve, your age, and how you have responded before.

The dose is not standard. It is calculated for you, and it is the single biggest variable in what a cycle costs.

Stage 2 — Monitoring and the trigger

Through the stimulation phase you will be scanned every two or three days. A transvaginal ultrasound counts the follicles and measures them; bloods track oestradiol. Together those show whether the ovaries are responding as expected, too slowly, or too enthusiastically.

The dose gets adjusted as this goes along. This is also the stage at which a cycle is occasionally cancelled if too few follicles develop, or if there is a risk of over-response. That is disappointing, but it is a decision made to protect you, and it is better made here than later.

When enough follicles have reached the right size, you are given a trigger injection to complete the final maturation of the eggs. The timing of this is exact. Retrieval happens roughly 34 to 36 hours afterwards, so the trigger is often given late at night to place the procedure in the morning.

Stage 3 — Egg retrieval

A short procedure, done under sedation, taking around twenty to thirty minutes.

A fine needle is passed through the vaginal wall under ultrasound guidance, and the fluid is drawn from each follicle. That fluid goes straight to the embryology laboratory, where the eggs are identified under a microscope.

Not every follicle yields an egg, and not every egg retrieved will be mature so the number of follicles seen on a scan and the number of eggs finally usable are rarely the same. This surprises people, and it is worth knowing in advance.

You will rest for an hour or two and go home the same day. Cramping and some bloating for a day or so is normal.

The male partner provides a sperm sample the same morning, or a previously frozen sample is thawed.

Stage 4 — Fertilisation: IVF or ICSI

This is the stage the letters refer to, and the one where the decision genuinely matters.

Conventional IVF means eggs and prepared sperm are placed together in a dish and fertilisation is left to happen on its own. It relies on the sperm being able to reach, bind to and penetrate the egg unaided.

ICSI intracytoplasmic sperm injection means a single sperm is selected and injected directly into each mature egg. It bypasses the steps conventional IVF depends on.

Which one is used is decided by the sperm, not by preference. Low count, poor motility, abnormal morphology, previous failed fertilisation, or sperm obtained surgically all point toward ICSI. Where the parameters are normal, conventional IVF is often the reasonable choice.

It is worth understanding that ICSI solves a specific problem getting the sperm inside the egg. It does not correct everything about the sperm. Where DNA integrity is the issue rather than motility, injecting a sperm does not repair the DNA it carries. That is why the assessment before the cycle matters, and why a clinic with andrology depth is looking at different things than one treating the male side as a box to tick.

Fertilisation is checked the following morning. Not every egg fertilises, and again the numbers narrow.

Stage 5 — Embryo culture

The fertilised eggs are kept in an incubator that holds temperature, humidity and gas composition steady, and they are observed as they divide.

Embryos are typically grown to day three, when they are at the cleavage stage of six to eight cells, or to day five, when they have reached blastocyst stage. Growing to day five allows more selection of embryos that were never going to progress before then but it is not right for everyone, particularly where only a small number are available.

Embryos are graded during this period. Grading describes appearance and rate of development, and it is useful for choosing between embryos. It is not a prediction, and a lower-graded embryo is not a failed one.

Stage 6 — Embryo transfer

Much simpler than the retrieval, and usually done without sedation.

A soft catheter is passed through the cervix under ultrasound guidance, and the embryo is placed in the uterine cavity. It takes a few minutes. You may be asked to arrive with a comfortably full bladder, which improves the ultrasound view.

The transfer can be fresh, a few days after retrieval in the same cycle, or frozen, with the embryos vitrified and transferred in a later cycle. Frozen transfer is increasingly common, and it is not a fallback. It allows the body to return to its own hormonal rhythm after stimulation, and it is often the deliberate choice.

Any remaining suitable embryos are frozen for later use.

Progesterone support begins around this point and continues until the pregnancy test, and beyond it if the test is positive.

Stage 7 — The wait, and the test

Around nine to fourteen days after transfer, a blood test measures beta hCG.

The interval between transfer and test is, by common agreement, the hardest part of the whole cycle. There is nothing to do and nothing to watch. Home urine tests during this window are unreliable; the trigger injection can still be in your system and produce a false positive, and it is too early for a negative to mean much. Waiting for the blood test is genuinely the better course, however difficult.

How long does an IVF cycle take?

Roughly four to six weeks from the first stimulation injection to the pregnancy test.

Stimulation accounts for 8 to 12 days. Retrieval to transfer is three to five days. Transfer to test is nine to fourteen. Protocols that include suppression in the preceding cycle add two to three weeks at the front.

The testing beforehand is separate and can take several weeks in itself, depending on where you are in your cycle when the investigations start.

What affects the cost of an IVF cycle?

Quotes for IVF vary widely between clinics, and a large part of that is what is included rather than what is charged. It is worth understanding the variables before comparing numbers.

Medication. Usually the largest single variable, and it is dose-dependent. Someone with reduced ovarian reserve often needs more, which is why a quote given before your assessment can only ever be approximate.

ICSI. An additional laboratory procedure, so it costs more than conventional IVF.

Freezing and storage. Vitrifying surplus embryos and storing them carries its own annual cost.

Genetic testing. Pre-implantation testing is optional and adds significantly.

Fresh or frozen transfer. A later frozen transfer is a separate procedure with its own cost.

The question worth asking any clinic is not what a cycle costs, but what is and is not included in the figure quoted and what a second cycle would cost, since it is not always the same as the first.

Frequently asked questions

How many injections are involved in IVF?

Most stimulation protocols involve daily injections for around 8 to 12 days, plus a trigger injection at the end. They are subcutaneous, self-administered at home, and most people manage them without difficulty after being shown once.

Is egg retrieval painful?

It is done under sedation, so you will not feel it. Afterwards, cramping and bloating for a day or two is common. Most people return to normal activity the following day.

How many eggs will be retrieved?

It varies considerably with age and ovarian reserve. Not every follicle contains an egg and not every egg is mature, so the number seen on a scan is always higher than the number finally usable.

Do I need ICSI or conventional IVF?

It is decided by the semen analysis and the fertilisation history, not by preference. Low count, poor motility, abnormal morphology, previous failed fertilisation or surgically retrieved sperm all point toward ICSI.

Can I work during an IVF cycle?

Most people do. The scans need appointments every few days during stimulation, and the retrieval needs a day off. The transfer usually does not.

How long is between one cycle and the next?

Commonly one to two months, to allow the ovaries to settle and to review what happened. If frozen embryos are available, a frozen transfer can often follow sooner than a full fresh cycle.

Does bed rest after transfer help?

There is no evidence that it does. Normal activity is generally advised.

Before you start

Two things are worth doing before the first injection.

Ask what the plan is if this cycle does not work. Not because it will not, but because the answer tells you how thoroughly the clinic has thought about your case specifically.

And make sure the male side has been investigated properly rather than screened. Roughly half of couples having difficulty conceiving have a male factor involved, and a conventional semen analysis is only the first layer of that. Where the picture is unclear, further sperm assessment changes the plan more often than people expect.

Conclusion

Six weeks, seven stages. What makes IVF hard is rarely the medicine it is not knowing. How many eggs, how many fertilise, how many reach day five.

The numbers narrow at every stage, and nobody says so in advance, which is why each drop feels like a setback rather than the normal shape of the process. A cycle that begins with fourteen follicles and ends with three good embryos has gone exactly as expected. Knowing that beforehand changes how the six weeks feel.

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This article is for general information and is not a substitute for individual medical advice. Protocols, timings and laboratory practice vary between clinics; follow the guidance given to you by the team treating you.