The IVF Process Timeline: Every Step From Consultation to Pregnancy Test

The short answer: 6 to 8 weeks per cycle

From the day you start medication to the day you take a pregnancy test, a single IVF cycle typically takes 4 to 6 weeks. But that doesn't include the consultation, diagnostic tests and waiting time beforehand — which can add another 2 to 12 weeks depending on the clinic and whether you're going private or NHS. The total timeline from first appointment to pregnancy test is usually 2 to 5 months.

Week 1–4: Initial consultation and diagnostic tests

Your first appointment is a conversation, not a procedure. The consultant reviews your medical history, discusses how long you've been trying, and orders a set of baseline tests. For women, this typically includes AMH (anti-Mullerian hormone) to assess ovarian reserve, an antral follicle count via ultrasound, and blood tests for FSH, LH, thyroid function and infection screening. For male partners, a semen analysis is standard.

Results usually take 1 to 2 weeks. Once everything's back, you'll have a follow-up where the consultant explains your treatment plan — which protocol they recommend, whether you need ICSI, and what the expected timeline looks like. At a private clinic, you can often start the next cycle. NHS patients may face a waiting list of 3 to 18 months depending on the area.

Week 4–5: Down-regulation (long protocol only)

Not everyone has this stage. If your clinic uses a long protocol, you'll take medication — usually a nasal spray or daily injection — to temporarily suppress your natural hormone cycle. This gives the clinic full control over when your eggs develop. Down-regulation typically starts on day 21 of your menstrual cycle and lasts about 2 weeks.

If you're on a short (antagonist) protocol, you skip this step entirely and go straight to stimulation on day 2 or 3 of your period. Short protocols are increasingly common in the UK because they're faster, use less medication, and have comparable outcomes for most patients.

Week 5–7: Ovarian stimulation (10–14 days)

This is the most intensive part. You'll inject gonadotropin hormones daily — usually in the evening, into your stomach or thigh — to stimulate your ovaries to produce multiple eggs instead of the usual one. The injections themselves are subcutaneous, meaning a small needle just under the skin. Most people say the anticipation is worse than the reality.

During stimulation, you'll visit the clinic every 2 to 3 days for transvaginal ultrasounds and blood tests. The clinic is monitoring how many follicles are growing and how large they are. They'll adjust your medication dose based on your response. Some women respond quickly and are ready in 8 days. Others need 14. The clinic is aiming for a sweet spot: enough follicles to give you good egg numbers, but not so many that you risk ovarian hyperstimulation syndrome (OHSS).

Physically, you may feel bloated, tender around the ovaries, and emotionally up and down. This is the hormones doing their job, and it's normal. If the discomfort becomes severe or you notice sudden weight gain or difficulty breathing, contact your clinic immediately — these can be signs of OHSS.

The trigger shot: 36 hours before collection

When the follicles reach the right size (usually 17–22mm), you'll take a 'trigger shot' — an injection of hCG or a GnRH agonist — that tells your body to mature the eggs for release. The timing of this injection is precise: exactly 36 hours before your scheduled egg collection. Your clinic will give you a specific time, sometimes 2am, and it matters. Set an alarm.

Egg collection day

This is a short surgical procedure, usually done under sedation (not general anaesthetic). A thin needle is guided through the vaginal wall into each ovary using ultrasound, and the fluid from each follicle — hopefully containing an egg — is aspirated out. The whole thing takes 15 to 30 minutes. You'll rest in recovery for an hour or two and then go home. Most clinics advise taking the rest of the day off.

Afterwards, expect some cramping, spotting and bloating. Paracetamol is usually fine; avoid ibuprofen. Most women feel back to normal within 2 to 3 days, though if you had a large number of eggs collected, the recovery can take longer.

The clinic will tell you how many eggs were collected that same day. The average across UK clinics is 8 to 14 eggs, but this varies widely depending on age, ovarian reserve and stimulation response.

Day 1: Fertilisation

The day after collection, the embryology team checks how many eggs have fertilised. In standard IVF, sperm and eggs are placed together in a dish and left to fertilise naturally. In ICSI — used in roughly 60% of UK cycles — a single sperm is injected directly into each mature egg. Your clinic will call you with the fertilisation report: how many eggs were mature, how many fertilised normally. Not all will. A fertilisation rate of 60–80% is typical.

Days 2–6: Embryo development and the daily updates

This is the part that can feel agonising. Your embryos are developing in the lab, and the clinic gives you updates — typically on day 3 and day 5. On day 3, embryos should be 6–8 cells. By day 5, the strongest will have reached the blastocyst stage: a ball of around 100 cells with a visible inner cell mass (which becomes the baby) and trophectoderm (which becomes the placenta).

Not all fertilised eggs make it to blastocyst. It's common to start with 8 fertilised eggs and end up with 2 or 3 blastocysts. This attrition is normal — it's nature's quality control happening outside the body instead of inside it. The embryos are graded (usually on a scale involving letters and numbers, like 4AA or 3BB) and the best one is selected for transfer.

Day 5 or 6: Embryo transfer

Embryo transfer is the simplest procedure in the whole process. No sedation needed. A thin catheter is passed through the cervix, and the embryo is placed in the uterus under ultrasound guidance. It takes about 5 minutes. You might be asked to arrive with a full bladder (it helps with the ultrasound image). There's no bed rest required afterwards — you can go about your normal day.

In the UK, single embryo transfer is standard for most patients under 37 on their first or second cycle. This is because transferring two embryos increases the chance of twins, which carries higher risks for both mother and babies. If you have surplus good-quality blastocysts, they'll be frozen for potential future use.

The two-week wait

After transfer, you wait. Officially it's about 10 to 14 days before your pregnancy blood test (beta hCG), though many clinics now schedule it at day 11 or 12. This is widely regarded as the hardest part of the entire process — not physically, but mentally. You can't do anything to influence the outcome at this point. The embryo either implants or it doesn't.

You'll be prescribed progesterone support — usually pessaries, injections or gel — to help maintain the uterine lining. Continue taking it until your clinic tells you to stop. Some people experience light spotting during this time, which can mean implantation or nothing at all. Symptom-spotting is inevitable but unreliable; early pregnancy symptoms and progesterone side effects are virtually identical.

Pregnancy test day

Your clinic will either ask you to come in for a blood test or take a home pregnancy test on a specific date. A positive result is followed by an early pregnancy scan at 6 to 7 weeks to confirm a heartbeat. A negative result means the cycle hasn't worked — which happens more often than not, statistically speaking. The average birth rate per cycle for women under 38 is around 30–35% at most UK clinics.

If it doesn't work, your clinic will usually schedule a review appointment to discuss what happened, whether anything should change for the next attempt, and whether you have frozen embryos available for a subsequent transfer — which is a much shorter and simpler process.

The complete IVF timeline at a glance

• Initial consultation and tests: weeks 1–4
• Down-regulation (long protocol only): 2 weeks
• Ovarian stimulation: 10–14 days
• Trigger shot: 36 hours before collection
• Egg collection: day procedure, 15–30 minutes
• Fertilisation check: next day
• Embryo development: 5–6 days
• Embryo transfer: day 5 or 6, 5-minute procedure
• Two-week wait: 10–14 days
• Pregnancy test: blood test or home test
• Total from start of medication to test: 4–6 weeks
• Total including consultations: 2–5 months

How to choose the right clinic for your cycle

The process is the same at every licensed UK clinic — the difference is in the outcomes, the costs and the experience. Some clinics have shorter waiting times. Some have higher birth rates for your age group. Some charge significantly more for the same procedure. On Vero Fertility, you can compare every HFEA-licensed clinic on verified pricing, success rates by age, and cost per live birth — so you can choose based on data rather than guesswork.