For those considering IVF, one of the first questions that often comes to mind is: How long does an IVF cycle take?
Starting IVF can feel like a big step, and knowing what to expect can make the process feel a little more manageable. While every person’s treatment journey is different, an IVF cycle generally takes around two to four weeks, depending on your individual treatment plan and whether you are having a fresh or frozen embryo transfer.
There are several stages involved, from initial medication and monitoring through to egg collection, fertilisation and embryo transfer. The exact timing can vary from person to person, and some treatment plans may take longer depending on how your body responds to medication or whether additional steps are needed.
So, what does an IVF cycle actually involve, and how long does each stage take?
Here is what you can generally expect at each stage.
Step 1: Ovarian Stimulation (10-12 days)
The first stage of IVF treatment is ovarian stimulation. During this stage, daily hormone injections are used to encourage the ovaries to develop several follicles, each of which may contain an egg. The aim is to stimulate the ovaries to produce multiple mature eggs, giving the best possible opportunity for fertilisation.
Throughout this part of the process, you will have regular appointments at the clinic to monitor how your ovaries are responding to the medication. This usually involves ultrasound scans and, where appropriate, blood tests to check hormone levels and track the development of the follicles.
The length of the stimulation phase can vary from person to person, depending on how your body responds to the medication. Once the follicles have reached the appropriate stage of development, you will be given a final trigger injection. This helps the eggs complete their maturation and ensures they are ready for collection at the right time.
Your clinic will give you clear instructions on when to take the trigger injection, as the timing is particularly important for the next stage of treatment: egg collection.
Step 2: Egg Collection (1-2 days)
Egg collection usually takes place around 34 to 36 hours after the trigger injection. The procedure is carried out at the clinic, where a fine needle is guided through the vagina to carefully collect the eggs from the follicles in the ovaries. The procedure is usually performed under sedation or anaesthesia to help keep you comfortable.
Once the eggs have been collected, they are taken straight to the laboratory. An embryologist will assess the eggs to determine their maturity and suitability for treatment. Where appropriate, the eggs are then fertilised with sperm using either conventional IVF or, if recommended, a procedure called ICSI (intracytoplasmic sperm injection).
The fertilised eggs are then monitored in the laboratory as they develop into embryos. Your care team will keep you informed about how the embryos are progressing and advise you on the next stage of your treatment.
Step 3: Embryo development (5 days)
Following fertilisation, the embryos are carefully monitored in the laboratory as they continue to develop. The embryology team will observe their growth and development over the following few days, looking at how they are progressing.
Around five days after fertilisation, an embryo may reach the blastocyst stage. At this point, the embryo has developed into a more advanced stage and, where appropriate, may be selected for transfer into the uterus.
The timing of embryo transfer can vary depending on your individual treatment plan and how the embryos develop. In some cases, embryos may instead be frozen for use at a later date as part of a frozen embryo transfer.
Step 4: Embryo transfer
Once the embryos have developed, the next step is embryo transfer. This can either happen during the same treatment cycle (fresh transfer) or at a later date (frozen transfer).
The embryo transfer itself is a relatively quick and straightforward procedure. A thin, flexible catheter is gently passed through the cervix and into the uterus, where the embryo is carefully placed. The procedure does not usually require anaesthesia and is generally completed within a short period of time.
After the transfer, you will be given advice from your clinic about any medication you need to continue taking and when to take a pregnancy test. The waiting period after embryo transfer can feel like an important part of the journey, but your clinic will be there to support you and explain what to expect next.
Step 5: The pregnancy test (10-14 days post embryo transfer)
Your clinic will advise you when to take a pregnancy test, generally around 10 to 14 days after transfer. The test detects human chorionic gonadotropin (HCG), a hormone that is produced during early pregnancy. The clinic will advise you on when to test and whether to continue any prescribed medication while you wait for your results.
If the result is positive, your fertility team will advise you on the next steps. If it is negative, your team can discuss the outcome and your options moving forward.
So, how long does an IVF cycle take:
From the beginning of ovarian stimulation to a fresh embryo transfer, an IVF cycle can take around two to three weeks, followed by the wait for a pregnancy test.
If embryos are frozen for a later transfer or undergo genetic testing, the timeline will be longer. The exact timing can also vary depending on how your body responds to medication, as your treatment plan may need to be adjusted throughout the cycle.
While there can be a lot to take in during IVF, having a clear idea of what each stage involves can make the process feel a little less daunting. Understanding the likely timeline can also help you prepare for each step, know what to expect and plan ahead as you move through your treatment.