One of the most consistent things patients say about starting IVF is that they did not know what to expect — either from the process itself, or from how long each stage would take. This guide maps the full IVF journey from GP referral to the pregnancy test, with typical timings and an honest account of what commonly causes delays.

Before the Cycle: Referral and Initial Assessment

Week 0: GP referral

IVF begins with a GP referral to a fertility clinic — either an NHS fertility unit or a private clinic. For NHS patients, the referral should be made once you meet your ICB's eligibility criteria. For patients going private, you can self-refer directly to most clinics without a GP referral, though your GP's notes and any previous test results will be needed.

Waiting time for first appointment: NHS fertility clinics typically have waiting times of three to six months for an initial consultation, and sometimes longer. Private clinics can usually offer an initial consultation within one to four weeks.

Week 1–4: Initial consultation and investigations

At your first appointment, the clinic will review your medical history and typically request or repeat:

  • AMH blood test (ovarian reserve)
  • Antral follicle count (AFC) by transvaginal ultrasound
  • Day 2–3 FSH and LH blood tests
  • Semen analysis (if applicable)
  • Uterine cavity assessment (saline sonogram or hysteroscopy if indicated)
  • Infectious disease screening for both partners

For a full explanation of what AMH measures and how it affects your treatment plan, see AMH and NHS IVF eligibility.

Week 4–6: Treatment plan and consent

Once results are reviewed, the clinic will propose a treatment protocol — typically a long protocol (down-regulation followed by stimulation), an antagonist protocol (stimulation with a blocker), or a mild/natural protocol. You will attend a nurse consultation to go through medication, injections, and the consent process. Most clinics also require attendance at a group or individual treatment information session before starting.

The Stimulation Phase

Week 6–8: Down-regulation (if applicable)

Patients on a long protocol begin with a period of down-regulation — either using a nasal spray or daily injections of GnRH agonist to suppress natural hormone production. This typically lasts two to four weeks. Not all protocols include this stage; antagonist protocols (now more commonly used) skip this phase.

Week 8–10: Stimulation

Stimulation injections begin — typically 10–14 days of daily subcutaneous injections of FSH (follicle-stimulating hormone), sometimes combined with LH. The clinic will schedule monitoring appointments:

  • Typically 2–3 transvaginal ultrasound scans during stimulation to measure follicle growth
  • Blood tests to check oestrogen levels

Depending on your response, the dose may be adjusted. If too many follicles develop, there is a risk of ovarian hyperstimulation syndrome (OHSS) and the cycle may be modified or frozen all embryos rather than doing a fresh transfer.

Egg Collection

Day 10–14 of stimulation: Trigger injection

When follicles reach the target size (typically 17–20mm), you administer a "trigger" injection (hCG or GnRH agonist) to mature the eggs. Egg collection is scheduled precisely 34–36 hours later.

Egg collection day

Egg collection is done under intravenous sedation or light general anaesthetic and takes approximately 20–30 minutes. A needle is passed through the vaginal wall under ultrasound guidance to aspirate fluid from each follicle. You will need someone to take you home and should plan to rest for the remainder of the day.

The embryologist will tell you how many eggs were collected, and the following day how many have fertilised normally (typically 70–80% of mature eggs). You are usually at home for 2–3 days before hearing about embryo development.

Embryo Development

Days 1–5 after egg collection

The fertilised eggs (embryos) develop in the laboratory. The clinic monitors development and typically calls you on Day 1 (fertilisation report) and Day 3 or 5 (development update). Most clinics aim for blastocyst development (Day 5) before transfer, as blastocysts have a higher implantation rate than Day 3 embryos.

Not all fertilised eggs reach the blastocyst stage — typically 40–60% do. If you have several good-quality blastocysts, the surplus will be frozen (vitrified) for future use.

Embryo Transfer

Day 5–6: Fresh transfer (if proceeding fresh)

Embryo transfer is a simple procedure done without sedation, similar to a smear test. A thin catheter is passed through the cervix under ultrasound guidance to place the embryo in the uterus. It takes around 10–15 minutes. You can go home shortly afterwards.

Many clinics now recommend a freeze-all strategy — freezing all embryos and doing a frozen transfer (FET) in a subsequent natural or medicated cycle — particularly where there is OHSS risk or where the uterine lining is not ideal after stimulation. This adds 4–8 weeks to the process but may improve implantation rates.

For detail on frozen embryo transfers, see frozen embryo transfer (FET): what to expect.

The Two-Week Wait

Days 6–13 post-transfer: The two-week wait

The two-week wait (2WW) is the period between embryo transfer and the blood pregnancy test. Most clinics ask you to avoid home pregnancy tests during this period because residual trigger medication can produce false positives.

Progesterone pessaries or injections continue throughout this period to support the luteal phase. Common symptoms — cramping, bloating, spotting — are caused by the progesterone and are not reliable indicators of pregnancy or its absence.

Pregnancy Test and Beyond

Day 14 post-transfer: Blood beta-hCG test

The clinic will typically ask you to have a blood hCG test at a hospital or clinic. A positive result confirms biochemical pregnancy. Ultrasound confirmation (typically at 6–7 weeks gestation) checks for heartbeat and intrauterine location.

A negative result means the cycle has not resulted in pregnancy. If frozen embryos are available, the next steps involve planning a FET cycle — usually four to eight weeks later.

Total Timeline: From Referral to Result

| Stage | Typical duration | |---|---| | GP referral to first NHS appointment | 3–6 months | | Initial investigations and consent | 4–6 weeks | | Down-regulation (long protocol only) | 2–4 weeks | | Stimulation | 10–14 days | | Embryo development | 5–6 days | | Fresh transfer to pregnancy test | 14 days | | Total (private, antagonist protocol) | ~10–14 weeks from first appointment | | Total (NHS, long protocol) | 6–12 months from GP referral |

What Causes Delays

The most common sources of delay:

  • NHS waiting lists for initial appointment and treatment scheduling
  • Cycle timing — treatment must start at a specific point in the menstrual cycle, which can add days or weeks if the timing does not align
  • Poor response to stimulation — requiring dose adjustment or cycle cancellation
  • OHSS risk — leading to freeze-all strategy instead of fresh transfer
  • Embryo quality — no suitable embryos reaching transfer stage
  • Uterine findings — polyps, fibroids, or thin lining requiring treatment before transfer

Frequently Asked Questions

Q: How long does one full IVF cycle take from start to pregnancy test?

A: For a private antagonist protocol with a fresh transfer, approximately 4–6 weeks from the start of stimulation to the pregnancy test. If you include initial consultations and investigations, 10–14 weeks from first appointment. NHS patients should factor in 3–6 months waiting time before treatment starts.

Q: How many appointments will I need during stimulation?

A: Typically 2–3 monitoring scans during the stimulation phase, plus egg collection. If you add initial consultations and embryo transfer, a full IVF cycle involves approximately 6–10 clinic visits in total.

Q: Can I work during IVF?

A: Most patients continue working during stimulation and after transfer. The days requiring time off are egg collection day (you will be sedated and need to rest) and embryo transfer (a few hours). Some patients find the emotional and physical demands of treatment make it helpful to reduce workload or work flexibly during a cycle, but this is a personal decision.

Q: What happens if no eggs are collected?

A: A cycle where stimulation produces follicles but no eggs are retrieved, or no eggs survive to fertilisation, is a cancelled cycle. Depending on your ICB's policy, this may or may not count as a used NHS cycle. See how many IVF cycles does the NHS fund? for detail on how cancelled cycles are treated.

Q: How soon can I do another cycle if the first one fails?

A: Most clinics recommend waiting one to two full menstrual cycles before starting another stimulated cycle to allow the ovaries to recover. If frozen embryos are available from the first cycle, a FET cycle can begin sooner — sometimes within 4–6 weeks.

This article is for information only and does not constitute medical advice. Clinic protocols and NHS waiting times vary; always confirm the specific timeline with your clinic.