IVF Medications: Types, Uses, and Side Effects (Expert Insights Included)

For many people – whether in a heterosexual relationship, a same‑sex partnership, or building a family on their own – the moment you begin researching IVF, you encounter a wall of unfamiliar medication names, injection schedules, and clinical terminology. It can feel overwhelming, especially when you are already carrying so much emotionally.

That anxiety is completely normal. And it’s exactly why we built this guide: to replace confusion with clarity, and fear with a plan.

Below you’ll find a clear, complete, and calming overview of the medications used throughout an IVF cycle – what each one does, how it’s given, what side effects to expect, typical costs, and how California’s SB 729 insurance law may help.

At Coastal Fertility Medical Center (CFMC) in Irvine, we’re here to answer any questions specific to your protocol and your situation.

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How IVF Medications Work: The Big Picture

An IVF cycle requires your body to do something it would never do naturally – produce multiple mature eggs at once, on a schedule your medical team controls. A carefully sequenced set of medications makes this possible.

As Dr. David Harari, MD, Reproductive Endocrinologist at CFMC, explains:

Each category serves a different purpose:

• Preparing the ovaries
• Stimulating follicle growth
• Preventing premature ovulation
• Triggering final egg maturation
• Supporting the uterine lining after retrieval

The sections below explain each phase in detail.

Before we dive into the phases, here is a complete medication reference table. Don’t let the length intimidate you – most patients only use a subset of these medications, and your Coastal Fertility physician will provide a personalized protocol built specifically for you.

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IVF Medications at a Glance: Full Reference Table

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Phase 1: Pre-Cycle Priming (Birth Control Pills)

Most IVF protocols begin with oral contraceptive pills taken for approximately two to three weeks before ovarian stimulation begins.

At first glance, this can seem confusing:

Why would you take birth control when trying to become pregnant?

Dr Harari says the answer is control and synchronization.

By suppressing your natural cycle temporarily, birth control pills allow your care team to synchronize follicle development across both ovaries. This coordinated start improves the chances of retrieving multiple mature eggs.

Common Side Effects

• Mild nausea
• Breast tenderness
• Mood changes
• Light spotting

Most patients tolerate this phase well because it is relatively short.

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Phase 2: Ovarian Stimulation (Gonadotropins)

Once suppression is complete, stimulation begins.

This is the phase most patients associate with IVF injections.

Gonadotropins are injectable hormones that tell the ovaries to grow multiple follicles simultaneously. Each follicle contains one potential egg.

According to Dr. Harari, you will have regular monitoring appointments to ensure your ovaries are responding safely and appropriately during this phase.

How Gonadotropins Are Given

• Subcutaneous injections (into abdominal fat)
• Usually once daily
• Typically administered in the evening
• Stimulation usually lasts 8–14 days

Most patients learn to self-inject after a short training session with a Coastal Fertility nurse.

Common FSH-Only Medications

• Gonal-F
• Follistim AQ

Common FSH + LH Combination Medications

• Menopur
• Repronex

Common Side Effects

• Bloating
• Mild abdominal pressure
• Breast tenderness
• Fatigue
• Mood changes
• Injection-site redness or bruising

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Phase 3: Preventing Premature Ovulation (GnRH Medications)

Think of these medications as the IVF cycle’s traffic-control system.

Their job is to prevent your body from ovulating too early, before the eggs can be retrieved.

There are two major categories of GnRH medications. They sound similar but work differently, and your doctor chooses the one that best fits your ovarian response profile.

GnRH Antagonists

Examples: Cetrotide, Ganirelix

GnRH antagonists work immediately. They are usually added around days 5–6 of stimulation and continue until the trigger shot.

This is now the most common IVF protocol because:

• It is shorter
• Requires fewer injections
• Has a lower risk of OHSS

Common Side Effects

• Injection-site reactions
• Mild headaches
• Fatigue

GnRH Agonists

Examples: Lupron, Synarel

GnRH agonists work through a longer process called downregulation. They are started earlier and temporarily suppress hormone signaling before stimulation begins.

These protocols are sometimes used for:

• Patients with diminished ovarian reserve
• Prior failed IVF cycles
• Specific hormone-response patterns

Common Side Effects

• Hot flashes
• Headaches
• Mood swings
• Temporary menopause-like symptoms

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Phase 4: The Trigger Shot (hCG or GnRH Agonist)

When your follicles reach the correct size – typically around 18–20 mm – you will take a trigger shot.

This is one of the most time-sensitive parts of the IVF cycle.

The trigger shot is administered exactly 36 hours before egg retrieval and prompts the eggs to complete their final maturation.

Common hCG Trigger Medications

• Ovidrel (subcutaneous)
• Pregnyl (intramuscular)
• Novarel (intramuscular)

For patients at elevated risk of OHSS, your physician may instead use:

• A Lupron trigger
• Or a “dual trigger” (hCG + Lupron)

Important Timing Reminder

Timing is critical.

Set multiple alarms and double-check your instructions carefully. If you miss your trigger timing, contact your clinic immediately.

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Phase 5: Luteal Phase Support (Progesterone and Estrogen)

After egg retrieval, your body needs additional hormonal support to prepare the uterine lining for implantation.

This phase is called luteal support.

Progesterone Options

Progesterone in Oil (PIO)

• Intramuscular injection
• Considered the most reliable form

Crinone

• Vaginal gel

Endometrin

• Vaginal insert

Prometrium

• Oral or vaginal capsule

Estrogen Support

Some patients – particularly those undergoing frozen embryo transfer (FET) cycles – also require estrogen support.

Common options include:

• Estrace pills
• Vivelle-Dot patches

Progesterone support often continues until 8–10 weeks of pregnancy, when the placenta begins producing sufficient hormones independently.

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Supportive and Adjunct Medications

Some IVF protocols also include additional medications designed to optimize implantation or reduce complications.

Common Adjunct Medications

• Low-dose aspirin: May improve uterine blood flow
• Antibiotics: Sometimes prescribed after egg retrieval to reduce infection risk
• Steroids (such as dexamethasone): Occasionally used to calm immune activity
• Prenatal vitamins: Usually started before stimulation; should include at least 400–800 mcg of folic acid

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How to Administer IVF Injections (In Brief)

Learning to self-inject can feel intimidating at first, but most patients become comfortable surprisingly quickly.

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Risks and Side Effects of IVF Medications

Most IVF medication side effects are mild and temporary.

The chart below explains what is common, what is manageable at home, and when to contact your clinic.

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Understanding OHSS

Ovarian hyperstimulation syndrome (OHSS) occurs when the ovaries respond too strongly to stimulation medications.

Mild OHSS is relatively common and usually resolves on its own.

More severe OHSS can involve:

• Rapid weight gain
• Significant abdominal swelling
• Vomiting
• Shortness of breath
• Dehydration

Your CFMC team monitors estradiol levels and follicle growth carefully throughout stimulation to minimize this risk.

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How Much Do IVF Medications Cost?

Medications are typically the highest variable cost in an IVF cycle and are usually billed separately from the IVF procedure itself.

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Ways to Reduce IVF Medication Costs

• Specialty fertility pharmacies: Freedom Fertility, MDR, and Mandell’s often offer better pricing than retail pharmacies
• Manufacturer assistance programs: Available for medications such as Gonal-F, Follistim, and Menopur
• Medication donation programs: Offered in some areas where legally permitted
• Insurance coverage: See below

For additional strategies, read our guide on reducing fertility treatment medication costs.

Insurance Coverage for IVF Medications in California

California SB 729 – effective January 1, 2026 – significantly expanded fertility coverage requirements for many fully-insured large-group health plans.

Under the law, many plans covering employers with 101+ employees must now provide IVF coverage.

Importantly, the law is inclusive of:

• LGBTQ+ individuals
• Same-sex couples
• Single intended parents

Coverage does not require proof of a traditional infertility diagnosis.

Are IVF Medications Covered?

That depends on your plan’s pharmacy benefit.

Some plans cover fertility medications under:

• Medical benefits
• Pharmacy benefits
• Or a combination of both

Always verify specifics directly with your insurer.

Important Limitations

• Self-insured employer plans (ERISA plans) are exempt
• Small-group plans (<101 employees) are not required to offer IVF coverage
• CalPERS implementation is delayed until July 1, 2027

Our CFMC financial coordinators can help verify your benefits and estimate potential out-of-pocket costs.

📞 Call us: (949) 726-0600

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IVF Medication Schedule: A Typical Timeline

Every IVF protocol is personalized, but a standard antagonist protocol often follows this general structure:

Frequently Asked Questions

Final Thoughts & Next Steps

The medication phase of IVF can feel like a lot to absorb at first.

But understanding what each medication does – and why your protocol is structured the way it is – often helps patients feel calmer, more informed, and more in control.

At CFMC, every protocol is personalized around your history, your goals, and the family you are trying to build.

Whether this is your first IVF cycle or you are coming to us after a difficult experience elsewhere, our team brings the same level of expertise, attention, and compassion to every patient.