Starting IVF can feel overwhelming. New medications, injections, blood tests, ultrasounds, egg collection, embryo development and embryo transfer can make the process seem complicated.

Understanding each stage can make treatment much easier to navigate.

Although every IVF cycle should be individualised, most treatments follow a series of key steps.

Step 1: Your Initial Fertility Consultation

IVF should begin with understanding why pregnancy has not occurred and whether IVF is actually the most appropriate treatment.

Your fertility specialist will usually review your reproductive and medical history, including previous pregnancies, menstrual cycles, fertility treatment, operations, medications and relevant family history.

Where applicable, both partners should be assessed.

The aim is not simply to start IVF—it is to identify factors that may influence the treatment strategy and chances of success.

Step 2: Fertility Investigations

Investigations vary according to individual circumstances.

For women, assessment may include pelvic ultrasound, ovarian reserve testing such as AMH, evaluation of ovulation and, when appropriate, assessment of the uterus and fallopian tubes.

For men, semen analysis is usually one of the first investigations.

Additional hormonal, genetic or imaging investigations may be recommended when clinically indicated.

Preconception screening and relevant infectious disease testing may also form part of preparation for treatment.

Once the results are available, your fertility specialist can discuss whether IVF is appropriate and develop an individualised treatment plan.

Step 3: Planning Your IVF Cycle

During a natural menstrual cycle, usually only one egg reaches maturity.

During IVF, fertility medications are used to encourage several follicles to develop simultaneously.

The stimulation plan is selected according to factors such as:

• Age
• AMH and ovarian reserve
• Antral follicle count
• Previous IVF response
• PCOS
• Endometriosis
• Body weight
• Risk of ovarian hyperstimulation
• Other medical considerations

Not every patient should receive the same medication dose or protocol.

Individualisation is an important part of modern fertility treatment.

Step 4: Ovarian Stimulation

Most patients administer fertility medication by a small injection under the skin each day.

The stimulation phase commonly lasts approximately 8–12 days, although this varies.

These medications encourage multiple follicles within the ovaries to grow.

Patients are taught how to administer the injections, and fertility nurses usually provide ongoing support throughout the cycle.

Step 5: Monitoring Your Follicles

During stimulation, ultrasound examinations are performed to monitor follicle development.

Blood tests may also be used depending on the treatment protocol and individual circumstances.

The objective is to determine how the ovaries are responding and identify the appropriate time for the final maturation or “trigger” injection.

Medication doses may occasionally be adjusted according to the response.

Step 6: Preventing Premature Ovulation

In many contemporary IVF cycles, a GnRH antagonist medication is introduced during stimulation.

Its purpose is to prevent the body’s natural LH surge from causing ovulation before the eggs can be collected.

Timing is important because spontaneous ovulation before egg collection can significantly affect the cycle.

Alternative approaches, including progesterone-based suppression, may be appropriate in selected treatment protocols, particularly when a fresh embryo transfer is not planned.

Step 7: The Trigger Injection

When the follicles have reached an appropriate stage of development, a trigger medication is administered.

This allows the eggs to undergo final maturation before collection.

The timing of the trigger and egg collection is carefully coordinated.

Depending on the IVF protocol and risk factors, the trigger may involve hCG, a GnRH agonist or another individualised strategy.

Patients at increased risk of ovarian hyperstimulation syndrome may particularly benefit from strategies designed to reduce that risk.

Step 8: Egg Collection

Egg collection is usually performed approximately 34–36 hours after the trigger, depending on the protocol used.

Under ultrasound guidance, a needle is passed through the vaginal wall into the ovarian follicles and follicular fluid is collected.

The laboratory then identifies the eggs within that fluid.

Sedation or anaesthesia is commonly used, depending on the clinic and individual circumstances.

Patients can usually return home on the same day but require appropriate post-procedure instructions and support.

Step 9: Sperm Preparation and Fertilisation

A semen sample is generally produced around the time of egg collection unless previously frozen sperm is being used.

The embryology laboratory prepares the sperm before fertilisation.

There are two main approaches.

With conventional IVF, eggs and prepared sperm are placed together and fertilisation occurs without injection of an individual sperm.

With intracytoplasmic sperm injection (ICSI), an embryologist selects a sperm and injects it directly into a mature egg.

ICSI is particularly useful for certain male-factor fertility problems and other specific clinical indications.

It is not necessarily required for every IVF cycle.

Step 10: Embryo Culture

After fertilisation, embryos are cultured in carefully controlled laboratory conditions.

Embryologists monitor their development over the following days.

Some embryos may reach the blastocyst stage, generally around day five or six after fertilisation.

Not every egg will be mature, not every mature egg will fertilise, and not every fertilised egg will develop into a usable blastocyst.

This natural attrition is an important part of understanding IVF.

Step 11: Fresh Transfer or Freeze-All?

An embryo may sometimes be transferred during the same treatment cycle. This is known as a fresh embryo transfer.

However, there are many situations where freezing suitable embryos and transferring one in a later cycle may be preferable.

A freeze-all approach may be considered when there is increased risk of OHSS, elevated hormone levels, endometrial concerns, genetic testing of embryos, or other clinical and logistical reasons.

Modern vitrification techniques allow embryos to be frozen rapidly and stored for future use.

Step 12: Embryo Transfer

Embryo transfer is usually a much simpler procedure than egg collection.

A thin catheter is passed through the cervix into the uterus, commonly under ultrasound guidance, and the embryo is gently deposited into the uterine cavity.

Anaesthesia is usually unnecessary.

In many circumstances, single embryo transfer is preferred because transferring multiple embryos increases the risk of twins and higher-order multiple pregnancy, which carry greater risks for both mother and babies.

Step 13: Progesterone Support

Progesterone may be prescribed around the time of embryo transfer to support the endometrium.

The route and duration depend on whether the transfer is fresh, natural-cycle frozen, modified-natural or hormone-replacement based.

Follow your clinic’s medication instructions carefully and do not discontinue progesterone without medical advice.

Step 14: The Pregnancy Test

A blood pregnancy test is performed after embryo transfer at the time recommended by your fertility clinic.

The waiting period can be emotionally challenging.

Testing too early at home can sometimes produce confusing results, particularly when hCG-containing trigger medications have been used.

If the test is positive, further blood testing and an early pregnancy ultrasound may be arranged.

If it is negative, a follow-up consultation is valuable.

A failed cycle does not necessarily mean that IVF will never work. Your specialist can review ovarian response, fertilisation, embryo development and transfer details before discussing the next step.

How Long Does IVF Take?

From the beginning of ovarian stimulation to egg collection is commonly around two weeks.

However, the complete journey can be longer depending on preliminary investigations and whether a fresh or frozen embryo transfer is planned.

For a freeze-all cycle, embryo transfer occurs later, allowing treatment to be planned separately from ovarian stimulation.

Does IVF Guarantee Pregnancy?

Unfortunately, no fertility treatment can guarantee a baby.

IVF success is influenced by many factors, particularly female age and embryo quality, as well as sperm factors, underlying diagnosis and previous reproductive history.

Clinic success rates also need careful interpretation because patient populations differ.

Your own estimated chance of success is more meaningful than a single headline percentage.

The Take-Home Message

IVF is not one procedure—it is a sequence of carefully coordinated steps.

The process includes fertility assessment, ovarian stimulation, monitoring, egg collection, fertilisation, embryo culture and eventually embryo transfer.

Most importantly, IVF treatment should be individualised.

Understanding what happens at each stage allows you to participate in decisions about your treatment and makes what can initially seem like a complicated process much more manageable.