If ovulation induction has been recommended, understanding how it works makes the process feel considerably less uncertain. The treatment is built around one idea: giving your ovaries the hormonal signal they need to develop and release an egg, and timing conception around that. For women whose cycles are irregular or unpredictable, that support can make a meaningful difference. This article covers how the treatment works, what ovulation stimulation medications in Melbourne are used and why, and what the key decision points look like along the way.
The Core Principle
In a natural cycle, the brain sends follicle stimulating hormone (FSH) to the ovaries. The ovaries grow a follicle containing a developing egg. When it reaches the right size, a surge of luteinising hormone (LH) triggers its release. That is ovulation. In women with irregular cycles or conditions like PCOS, this signalling chain is disrupted. The ovaries may receive inconsistent signals, or the hormonal environment prevents follicles from developing fully and releasing on time. Ovulation induction medications restore or amplify the FSH signal so that follicle development can proceed, and ovulation can be timed with confidence.
The Medications
There are three main categories. Which one is recommended depends on the cause of the ovulatory dysfunction, hormone levels, and how a person has responded in previous cycles.
Letrozole
Letrozole is the preferred first-line medication for most women, particularly those with PCOS. It works as an aromatase inhibitor. It temporarily blocks the conversion of androgens to oestrogen, and the resulting drop in oestrogen prompts the brain to increase FSH. That stimulates the ovaries to develop a follicle. Because letrozole clears the body quickly, its effect does not persist into the window when the uterine lining is thickening. This tends to be an advantage over clomiphene for endometrial development. It is taken as a tablet once daily for five days from day 2 of the cycle. The starting dose is typically 2.5mg.
Clomiphene Citrate
Clomiphene (Clomid) has been used in ovulation induction for several decades and remains effective for many women. It works by blocking oestrogen receptors in the hypothalamus, prompting the brain to increase FSH output. The starting dose is usually 50mg, taken once daily for five days from day 2. One consideration is that clomiphene’s anti-oestrogenic effect on the uterine lining can persist beyond the medication phase. For some women this is not clinically significant. For others, it can affect implantation conditions. It is one reason letrozole is now the more common starting point.
Injectable Gonadotropins
When oral medications do not produce ovulation, or where more controlled stimulation is needed, injectable gonadotropins are introduced. Gonadotropins are injectable forms of FSH that directly stimulate the ovaries. They are more potent than oral options and require closer monitoring, but they are an important option for women who do not respond to tablets. Injections are self-administered daily from around day 2 or 3. Your nurse will demonstrate the process and provide support before the first cycle begins.
How a Treatment Cycle Works
Days 2 to 6: Medication
Medication begins on day 2 (day 1 is the first full day of bleeding) and is taken for five days. For injectable cycles, daily injections continue until monitoring indicates follicles are approaching the target size.
Days 8 to 12: Monitoring
Monitoring is what makes ovulation induction precise rather than approximate. Ultrasound scans from around day 8 track follicle growth. A follicle ready for ovulation is generally 18 to 20 millimetres in diameter. Blood tests measuring oestradiol and LH run alongside scans to confirm the hormonal picture. The number of monitoring visits varies. Some cycles require two. Others need more if the response is slower or additional follicles are developing that need to be assessed before proceeding. If too many follicles develop, the cycle may be paused. This is a safety measure, not a failure.
The Trigger Injection
Once a follicle reaches the right size, a trigger injection of hCG is given. This replicates the natural LH surge and initiates the final stages of egg maturation. Ovulation occurs approximately 36 to 40 hours later. Your specialist uses this window to time intercourse or, where IUI is part of the plan, the insemination. The trigger is a small subcutaneous injection administered at home. Your nurse will walk you through it before your first cycle.
Timed Intercourse or IUI
For timed intercourse cycles, sex is recommended on the day of the trigger and again 24 to 36 hours later. Where IUI is combined with ovulation induction, the insemination is scheduled around 36 hours after the trigger. A prepared sperm sample is placed directly into the uterus via a thin catheter. It takes only a few minutes.
The Pregnancy Test
A blood test around day 21 checks progesterone levels to confirm ovulation occurred. A pregnancy test follows approximately 14 days after the trigger. If the result is negative, your specialist reviews the cycle data before deciding whether to repeat the same approach, adjust the dose, or discuss other directions.
The Decision Points
Ovulation induction is not a fixed protocol. Several decisions shape what treatment looks like for each person.
Which medication to start with depends on your diagnosis. For PCOS, letrozole is first-line based on evidence showing higher pregnancy and live birth rates than clomiphene in this group.
Whether to include IUI depends on individual circumstances. Some people proceed with timed intercourse alone. Others add IUI to improve the chance of fertilisation each cycle. Your specialist will discuss whether it is likely to add meaningful benefit.
How many cycles to continue is reviewed as treatment progresses. If ovulation is occurring consistently but pregnancy has not followed, the question becomes whether something else is contributing, and whether IVF would provide better insight and a higher chance of success.
When to move to injectables is guided by your response to oral treatment. If follicles are not reaching the target size after dose adjustments, gonadotropins are the next step.
When to consider IVF comes up when ovulation induction has produced a consistent response but pregnancy has not occurred, when other factors emerge during monitoring, or when age and ovarian reserve make a more direct path the right clinical decision.
At every point, the goal is to use the least complex treatment that gives you the best realistic chance, and to move forward when the evidence from your cycles suggests a different approach is warranted.
A Note on Medications and Costs
All ovulation induction treatment medications are prescribed by your specialist following a full assessment. They are not currently PBS-subsidised for ovulation induction and are paid for privately. Your specialist will give you a clear breakdown of costs before treatment begins. Letrozole and clomiphene are available from standard or compounding pharmacies with a prescription. Injectable gonadotropins are available through fertility pharmacies and delivered directly to you. Your nurse coordinator will guide you through the process.
Your Next Step
If irregular ovulation is affecting your ability to conceive, ovulation induction may be an effective first step. At Create Fertility Melbourne, our specialists assess your individual circumstances and develop a personalised treatment plan designed to maximise your chances of success while avoiding unnecessary intervention. If you’d like to discuss whether ovulation induction is right for you, book a consultation with our team.
Frequently Asked Questions
How is ovulation induction different from IVF?
Ovulation induction supports the development and release of one or two eggs, with fertilisation occurring naturally. IVF involves stronger stimulation to produce multiple eggs for laboratory fertilisation. Ovulation induction is appropriate when ovulatory dysfunction is the primary factor and other conditions are favourable.
How will I know if the medication is working?
Monitoring ultrasounds show follicle growth directly. Blood tests measuring oestradiol confirm the hormonal response. If a follicle is developing and bloods are tracking as expected, the medication is working.
Can I work and exercise normally?
Yes. Most people continue their normal routine throughout a cycle. If you are on injectable gonadotropins and responding strongly, your specialist may advise reducing intense exercise in the days around the trigger.
What if I do not ovulate even with medication?
Not responding to one medication does not mean treatment cannot be effective. Your specialist will discuss moving to injectables or, depending on the full clinical picture, whether IVF is the more appropriate next step.
How soon will I know if it has worked?
Each cycle takes approximately 28 to 35 days from day 2 to the pregnancy test. If the result is positive, your specialist will arrange an early scan. If not, you will review the cycle data together before deciding on next steps.
