After 5 Days of IVF Injections: What Happens Inside Your Ovaries
After 5 days of IVF injections, you may feel bloated, heavy, or slightly uncomfortable—or you may feel completely normal. Either way, you may be wondering: Are my IVF injections working? What is happening inside my ovaries?
This stage of IVF treatment can feel uncertain because the most important changes are happening inside your ovaries, where you cannot see them.
During IVF stimulation, fertility medications encourage multiple ovarian follicles to grow at the same time. Your fertility specialist monitors this response through ultrasound scans and blood tests to understand how your ovaries are responding and whether your IVF medication needs adjustment.
In this guide, we explain what happens after 5 days of IVF injections, what your first IVF monitoring scan looks for, what symptoms you may experience, and what happens next on the journey toward egg retrieval.
Why Are IVF Injections Given During IVF Treatment?
In a natural menstrual cycle, several small follicles may begin developing in the ovaries, but usually only one becomes dominant and releases an egg during ovulation.
During IVF treatment, the goal is different. Fertility medications containing hormones such as FSH encourage multiple follicles to continue growing together.
This process is called ovarian stimulation.
The purpose is to develop several mature follicles so that your fertility specialist can retrieve multiple eggs during the egg retrieval procedure. The number and quality of eggs obtained can influence the opportunities available for fertilisation and embryo development.
This is why daily IVF injections are an important part of many IVF treatment protocols.
What Happens in Your Ovaries After 5 Days of IVF Injections?
By around day 5 of IVF stimulation, the follicles in your ovaries are actively developing.
A follicle is a small fluid-filled structure in the ovary that contains an immature egg. During ovarian stimulation, a group of follicles grows together instead of allowing only one follicle to become dominant.
Follicle sizes can vary considerably from patient to patient and from cycle to cycle. Your fertility specialist uses ultrasound monitoring to measure their development rather than relying on symptoms alone.
As follicles grow, they produce increasing amounts of estradiol (E2). Your fertility clinic may monitor estradiol levels through blood tests alongside ultrasound examinations.
Your ovaries may also become larger than usual during stimulation. This can contribute to feelings of:
- Bloating
- Pelvic fullness
- Mild abdominal discomfort
- Heaviness
- Breast tenderness
- Tiredness
- Mood changes
However, every patient responds differently to IVF medication.
First IVF Monitoring Scan: What Happens Around Day 5 or 6?
Around day 5 or 6 of ovarian stimulation, your IVF specialist or fertility doctor may schedule an important monitoring appointment.
Depending on your individual IVF protocol, monitoring may include:
- A transvaginal ultrasound
- Follicle count and measurement
- Assessment of the uterine lining
- Estradiol blood testing
- Review of your symptoms and medication response
The ultrasound allows your fertility team to see how many follicles are developing and how quickly they are growing.
The blood test can provide additional information about your hormonal response to stimulation.
Together, these assessments help your fertility clinic decide whether your current IVF medication dosage should remain the same or be adjusted.
Why Is IVF Monitoring So Important?
Regular monitoring is one of the most important parts of IVF treatment.
Your fertility specialist does not simply follow a fixed schedule. The treatment plan can be modified according to your ovarian response.
Your doctor may adjust medication if:
- Follicles are developing more slowly than expected
- The ovarian response is stronger than expected
- Follicle growth is uneven
- Hormone levels require closer monitoring
- There is a concern about excessive ovarian response
This personalised approach helps your fertility team balance treatment effectiveness with patient safety.
What Is Your IVF Specialist Looking for After 5 Days?
The first monitoring scan provides your IVF specialist with useful information about your response to ovarian stimulation.
Your doctor may assess:
1. Number of Developing Follicles
The ultrasound helps identify how many follicles are responding to the IVF medication.
2. Follicle Size
Your fertility specialist measures the follicles to determine how they are progressing.
3. Estradiol Levels
Estradiol levels can provide additional information about follicular activity and ovarian response.
4. Endometrial Lining
Your doctor may also evaluate the thickness and appearance of the uterine lining, depending on your treatment plan.
5. Overall Ovarian Response
The combination of ultrasound findings, hormone levels, medical history and symptoms helps your fertility team determine the next step.
Why Might an Antagonist Injection Be Added?
Some patients may be asked to start an antagonist injection during ovarian stimulation.
Medications such as Cetrotide or Ganirelix may be used in certain IVF protocols to help prevent premature ovulation.
The purpose is to prevent an unwanted hormonal surge from causing ovulation before the eggs are ready for retrieval.
If your IVF clinic adds another injection around this stage, it does not necessarily mean there is a problem. It may simply be a planned part of your individual IVF stimulation protocol.
Always take IVF medications exactly as prescribed by your fertility specialist.
What Should You Feel After 5 Days of IVF Injections?
One of the most important things to remember during IVF treatment is that symptoms do not tell the complete story.
Some patients experience noticeable symptoms, while others feel almost completely normal.
You may experience:
- Mild bloating
- Pelvic heaviness
- Abdominal fullness
- Mild tenderness
- Tiredness
- Breast tenderness
- Mood changes
- Minor bruising or soreness at injection sites
At the same time, having very few symptoms does not mean your IVF injections are not working.
The most reliable way to assess your ovarian response is through the monitoring recommended by your fertility clinic, including ultrasound and blood tests when required.
When Should You Contact Your Fertility Clinic?
Mild discomfort can occur during ovarian stimulation, but some symptoms require prompt medical attention.
Contact your fertility clinic or IVF specialist if you experience symptoms such as:
- Rapidly increasing abdominal swelling
- Significant or worsening abdominal pain
- Sudden or rapid weight gain
- Reduced urination
- Difficulty breathing
- Severe nausea or vomiting
- Any symptom that concerns you
These symptoms can sometimes be associated with ovarian hyperstimulation syndrome (OHSS) or another complication and should be assessed by your medical team.
Do not wait for your next scheduled appointment if you develop concerning symptoms.
What Happens After 5 Days of IVF Injections?
Your IVF stimulation does not usually finish after five days.
The duration of ovarian stimulation varies depending on your age, ovarian reserve, treatment protocol, follicular response and other clinical factors.
Your fertility specialist will continue monitoring follicle development and hormone levels as appropriate.
A simplified IVF treatment timeline may look like this:
| IVF Stage | Approximate Timing | What Happens |
|---|---|---|
| Ovarian stimulation | Early IVF cycle | IVF injections encourage multiple follicles to grow |
| First monitoring | Around Day 5–6 | Ultrasound and blood tests may assess ovarian response |
| Continued stimulation | Following days | Medication and monitoring continue according to response |
| Follicles approaching maturity | Later stimulation | Your fertility specialist assesses readiness for triggering |
| Trigger injection | When appropriate | Final medication helps prepare the eggs for retrieval |
| Egg retrieval / OPU | Usually about 34–36 hours after trigger | Eggs are collected from the ovaries |
The exact timing varies between patients and IVF protocols. Your fertility specialist will determine the appropriate schedule for your cycle.
What If Your IVF Response Is Slower Than Expected?
Not every IVF cycle follows the same pattern.
Some patients may develop follicles more slowly than expected or have fewer developing follicles.
This does not automatically mean that IVF treatment will not work.
Your fertility specialist may:
- Continue stimulation for longer
- Adjust medication
- Increase monitoring
- Reassess follicular development
- Modify the treatment plan according to your individual response
The important point is that IVF treatment is personalised.
Your fertility clinic uses monitoring results to make decisions based on your body rather than following a one-size-fits-all schedule.
What If Your Ovaries Respond Very Strongly to IVF Injections?
Some patients develop a large number of follicles during ovarian stimulation.
A strong ovarian response can occur more commonly in certain patients, including some women with PCOS.
In these situations, your IVF specialist may focus particularly on safety and may modify medication or monitoring.
Depending on the individual situation, your doctor may also discuss strategies such as freezing embryos for a later transfer when clinically appropriate.
The goal is not simply to produce as many follicles as possible. The goal is to achieve an appropriate ovarian response while maintaining patient safety.
From IVF Injections to Egg Retrieval
After the initial monitoring stage, your follicles continue to develop under the supervision of your fertility team.
When the follicles reach the appropriate stage, your doctor may prescribe a trigger injection.
The trigger completes the final maturation process of the eggs and allows your fertility team to schedule egg retrieval, also called oocyte pick-up (OPU).
During egg retrieval, the fertility specialist uses ultrasound guidance to collect eggs from the developing follicles.
The retrieved eggs are then taken to the IVF laboratory, where they may be fertilised using conventional IVF or ICSI, depending on the treatment plan.
What If Your IVF Cycle Does Not Follow the “Textbook” Pattern?
Every patient and every IVF cycle is different.
Your follicles may grow at different rates. Your hormone levels may change differently from someone else’s. You may experience many symptoms—or almost none.
This is why regular IVF monitoring is so important.
Ultrasound scans and blood tests allow your fertility specialist to assess your response and make treatment decisions throughout the stimulation phase.
An unexpected response is not necessarily a treatment failure. It is information that helps your medical team personalise your care.
The Imprimis IVF Approach to Personalised Fertility Treatment
At Imprimis IVF, fertility treatment is tailored to each patient’s clinical profile and ovarian response.
During IVF stimulation, your medication dosage, monitoring schedule and treatment decisions are guided by how your body responds throughout the cycle.
After 5 days of IVF injections, monitoring can provide valuable information about:
- Follicular growth
- Ovarian response
- Hormone levels
- Endometrial development
- Medication response
- The next stage of your IVF treatment
The aim is not simply to stimulate the ovaries. It is to provide personalised, carefully monitored fertility treatment while keeping patient safety and clinical needs at the centre of the process.
Frequently Asked Questions About IVF Injections After 5 Days
Is it normal to feel bloated after 5 days of IVF injections?
Mild bloating or pelvic fullness can occur during ovarian stimulation because the ovaries contain multiple developing follicles. However, significant or rapidly worsening symptoms should be reported to your fertility clinic.
What size should follicles be after 5 days of IVF injections?
No single follicle size is ideal for every patient on day 5. Follicle growth varies with ovarian reserve, medication protocol, and individual response. Your IVF specialist will assess the overall pattern rather than relying on one measurement.
Is the first IVF scan done after 5 days?
Many IVF protocols include an early monitoring scan around day 5 or 6, but the exact timing depends on the patient’s treatment protocol and the fertility specialist’s clinical judgment.
What happens if follicles are growing slowly during IVF?
Your fertility specialist may continue stimulation, adjust medications or increase monitoring depending on your individual response. Slow follicular growth does not automatically mean that the IVF cycle will fail.
How long after IVF injections is egg retrieval done?
The overall stimulation period varies between patients. Once the follicles reach the appropriate stage, a trigger injection is given, and egg retrieval is generally scheduled around 34–36 hours later.
Can I have no symptoms after 5 days of IVF injections?
Yes. Some patients experience very few symptoms during ovarian stimulation. The absence of symptoms does not necessarily indicate a poor response. Ultrasound and blood tests provide much more useful information about how your ovaries are responding.
Final Thoughts: Trust the Monitoring, Not the Symptoms
After 5 days of IVF injections, your ovaries are already responding to the stimulation medications, even if you cannot feel anything happening.
Some patients feel bloated and uncomfortable. Others feel completely normal. Neither experience alone tells you whether your IVF treatment is progressing well.
Your IVF specialist and fertility clinic use ultrasound scans, hormone tests and your individual medical history to understand what is happening and decide what comes next.
If you are currently undergoing IVF treatment and have questions about your stimulation, monitoring scan or medication, speak with your fertility care team. Understanding what is happening at each stage can make the IVF journey feel less uncertain and more manageable.






























