IVF Process Step by Step: What to Expect

What Are the 5 Stages of the IVF Process?

IVF is a structured, step-by-step treatment. Knowing what each stage involves helps you prepare and stay grounded throughout the cycle. For a broader overview, see our IVF 101 complete treatment guide.

1. Initial Consultation and Testing

Your journey begins with a detailed consultation. Your medical history is reviewed and baseline tests (hormone panels, spermiogram, and ultrasound, among others) are planned so that the protocol can be built around your own results.

2. Ovarian Stimulation

Starting on the 2nd or 3rd day of menstruation, hormone medications are administered to stimulate the ovaries to produce multiple high-quality eggs. This process is closely monitored through ultrasound scans and blood tests to ensure an optimal response, as described by Mayo Clinic.

3. Egg Collection (OPU - Ovum Pick-Up)

When the eggs reach maturity, they are collected under sedation in a 15-20 minute procedure. On the same day, a sperm sample is obtained from the male partner and prepared in the laboratory so that the most suitable sperm are used. Some clinics offer microchip sperm selection as a paid extra at this point; the HFEA rates IVF add-ons by the strength of the evidence behind them, so ask what it would add in your case.

4. Embryo Transfer

Between 2-6 days after egg collection, the best-developing embryo is placed into the uterus through a thin catheter. The transfer needs no anesthesia and is usually painless, though it can be uncomfortable if the cervix is difficult to pass. If additional good-quality embryos remain, they can be frozen for later use; our guide to frozen embryo transfer explains how that works.

5. Pregnancy Test

Fourteen days after the transfer, a pregnancy test measures the outcome of the treatment. This waiting period, often called the "two-week wait," completes the treatment cycle.

What Does an IVF Cycle Actually Feel Like, Stage by Stage?

The stages above describe what happens clinically. This is how they tend to arrive in practice, one after another.

What Happens in the Embryology Laboratory?

The laboratory is the least visible and most decisive part of IVF. You experience it almost entirely through phone calls, which is why the numbers in those calls carry so much weight.

The fertilization check

The morning after collection, the embryologist checks which eggs have fertilized normally. Not every egg collected is mature, and not every mature egg fertilizes. This is the first point at which your numbers drop — it is expected, and almost nobody warns you how it feels.

Culture and assessment

Fertilized eggs are grown in incubators that reproduce the conditions of the body. Over the following days they divide, first into a small cluster of cells and then, if they continue, into a blastocyst — a more developed structure in which distinct cell types have begun to form. Embryos are assessed on their appearance and their pace of development, and some stop along the way. Attrition at each step is a feature of the process, not evidence that something has gone wrong.

Selection and freezing

The embryologist ranks the embryos that reach transfer stage and recommends one. Any remaining good-quality embryos can be frozen for later, which is why a single collection can support more than one attempt.

IVF vs. ICSI: Which Option Is Right for You?

While both methods achieve fertilization in a laboratory environment, they differ in how the egg and sperm are brought together.

Is IUI a Simpler Alternative to IVF?

Intrauterine insemination (IUI) is a less invasive assisted reproductive technique often evaluated before progressing to IVF treatment. It does not require anesthesia and is performed in an outpatient setting.

How Is IUI Performed?

During the woman's ovulation period, specially prepared sperm (washed and concentrated in the laboratory) are injected directly into the uterus using a catheter.

Who Is IUI Suitable For?

IUI is especially preferred in cases of unexplained infertility (ESHRE). For IUI to have a reasonable chance, certain conditions generally need to be in place:

• Open fallopian tubes are essential, since fertilization happens inside the body (verified through HSG or a similar test)
• Adequate sperm count and motility — clinics commonly look for a prepared count in the region of 10 million/ml, though the threshold varies between centers
• Sperm morphology within the range your clinic works to

IUI vs. IVF: What Are the Key Differences?

• Location of fertilization: In IUI, fertilization occurs inside the mother's body; in IVF, it occurs in the laboratory
• Success rates: IVF typically offers higher success rates per cycle, according to HFEA data
• Cycle limit: The chance of success per IUI cycle falls after the first few attempts, so clinics set a limit before moving to IVF. How many cycles is a clinical judgment and guidance differs between countries, so ask your specialist what they recommend and why

For a fuller side-by-side breakdown, read our IVF vs. IUI comparison.

What Can Change the Plan Mid-Cycle?

IVF is planned in advance and adjusted in real time. Being told the plan has changed is common, and it usually means your team is responding to information rather than that something has gone wrong.

• A dose adjustment: the most frequent change of all. Scans show how your ovaries are responding, and medication is tuned to match.
• A cancelled cycle: if too few follicles develop, or if the response becomes unsafe, your team may stop before retrieval. It is genuinely disappointing, and it is usually the right call — what is learned reshapes the next protocol.
• A freeze-all decision: all embryos are frozen and transfer is deferred to a later cycle, often to let the uterine lining recover or to avoid the risk of ovarian hyperstimulation. This is a protective choice, not a setback.
• No fertilization, or no embryo reaching transfer: uncommon, and painful when it happens. It is also the clearest diagnostic information a cycle can produce.

Ask your team at the outset what would trigger each of these. A phone call changing the plan is much easier to absorb when it is not the first time you have heard the words.

Your Next Step: Personalized Fertility Care

Every fertility journey is unique. Wholecares helps coordinate your care with the specialists at a partner fertility clinic. Contact us for a free consultation and a personalized treatment plan from a partner clinic.