When your IVF cycle begins, you may walk out of your first appointment with a bag full of medications and a schedule that looks more like a spreadsheet than a treatment plan. Gonadotropins, antagonists, trigger shots, progesterone support. Each one has a specific job, and each one is timed to work with the others, not against them.
This guide walks through every medication you’re likely to encounter during an IVF cycle at RSMC, organized by the phase of treatment where it’s used. You’ll find what each drug does, the brand names you might recognize on your prescription label, and where it fits into your overall protocol.
Key Takeaways
IVF Medications at a Glance
The table below breaks every medication down by category and cycle phase, so you can see at a glance where each one fits.
Phase 1: Pre-Cycle Medications
Before a single stimulation injection begins, most protocols spend a few weeks establishing a predictable cycle.
Birth Control Pills
Many IVF protocols start with several weeks of birth control pills before stimulation begins. This isn’t about contraception. Birth control pills give your care team control over timing. They allow follicles to start stimulation at a similar size and reduce the chance that an ovarian cyst interferes with your protocol. They also let the clinic schedule your monitoring appointments and retrieval date with more precision.
Lupron (Leuprolide Acetate): GnRH Agonist Protocol
Lupron is a GnRH agonist. It initially stimulates, then suppresses, your pituitary gland’s release of the hormones that trigger ovulation. In a Lupron protocol, you typically begin daily injections in the cycle before stimulation starts and continue them through part of the stimulation phase. This suppression keeps your body from releasing eggs on its own schedule, so the gonadotropins can grow multiple follicles in a controlled, monitored way.
Not every protocol uses Lupron for suppression. Antagonist protocols, covered below, take a different approach that starts later in the cycle and usually involves fewer injection days. Your physician will determine which protocol fits your hormone profile and history.
Phase 2: Ovarian Stimulation Medications (Gonadotropins)
Gonadotropins are the core of the stimulation phase. These medications contain follicle-stimulating hormone (FSH), sometimes combined with luteinizing hormone (LH). They work directly on the ovaries to encourage multiple follicles to grow at once, instead of the single follicle your body would typically produce in a natural cycle. Your dose is adjusted throughout stimulation based on the ovarian stimulation monitoring schedule your clinic follows, which tracks your bloodwork and ultrasounds every few days.
FSH-Only Medications: Gonal-F and Follistim
Gonal-F and Follistim are both recombinant FSH medications. The hormone is manufactured in a lab rather than derived from urine, as some older gonadotropins were. Both come in pen injectors designed to let you give yourself an injection at home.
Gonal-F vs. Follistim: What Is the Difference?
This is one of the most common questions patients ask heading into stimulation.
Either one fits into the same daily injection routine.
FSH + LH Combination Medication: Menopur
Menopur is a human menopausal gonadotropin (hMG), meaning it contains both FSH and LH activity. That added LH can help ovaries that respond better with some support beyond FSH alone, including some patients with a diminished ovarian reserve.
Phase 3: Preventing Premature Ovulation
Once your follicles are growing, your body’s own hormonal feedback loop will eventually try to trigger ovulation on its own. If that happens before retrieval, the cycle can be compromised. GnRH antagonists exist to prevent exactly that.
GnRH Antagonists: Cetrotide and Ganirelix
Cetrotide and Ganirelix are both GnRH antagonists. They block the hormone surge that would otherwise cause premature ovulation. Unlike Lupron, which starts well before stimulation, antagonists are usually introduced partway through the stimulation phase, once follicles reach a certain size, and continued daily until the trigger shot.
Cetrotide vs. Ganirelix: Is There a Difference?
These are typically the last new medication introduced before the trigger shot.
These are typically the last new medication introduced before the trigger shot.
Phase 4: The Trigger Shot
The trigger shot is a single, precisely timed injection that tells your eggs to complete their final stage of maturation. It’s typically given 36 hours before your scheduled retrieval, and the timing is one of the most exact instructions you’ll receive during your entire cycle.
Your physician will choose between an hCG trigger, most commonly Ovidrel, Pregnyl, or Novarel, and a Lupron trigger, often used instead of or alongside hCG for patients at higher risk of ovarian hyperstimulation syndrome (OHSS).
What Happens If You Miss a Dose or Give the Trigger Late?
Missing or mistiming a stimulation dose by a few hours is rarely a crisis. Call your care team, and they’ll tell you whether to take it right away, adjust your next dose, or come in for extra monitoring. The trigger shot is the one exception where timing truly cannot shift. It’s calculated backward from your exact retrieval time, and giving it even an hour or two late or early can change how mature your eggs are at retrieval. If you’re ever unsure whether you gave a dose, gave it at the wrong time, or missed one entirely, call your clinic’s after-hours line immediately rather than waiting until your next appointment.
Phase 5: Post-Retrieval and Transfer Support
Once retrieval is complete, your eggs are fertilized in the lab, often using ICSI (intracytoplasmic sperm injection) to inject a single sperm directly into each mature egg. From there, the focus of your medications shifts from growing follicles to preparing the uterine lining to receive an embryo, whether that’s a fresh transfer shortly after retrieval or a frozen embryo transfer (FET) in a later cycle.
Progesterone: PIO, Crinone, and Endometrin
Progesterone thickens and stabilizes the uterine lining so an embryo can implant, and an early pregnancy can continue. Progesterone in oil (PIO) is an intramuscular injection, typically once daily. Crinone and Endometrin are vaginal alternatives, a gel or an insert rather than a shot. Some protocols combine both.
Estrogen for Frozen Embryo Transfer: Estrace and Delestrogen
FET cycles have no ovarian stimulation to naturally raise estrogen, so it’s supplemented directly to build the uterine lining. Estrace is taken orally or vaginally; Delestrogen is an injection. Your care team monitors lining thickness by ultrasound and adjusts your dose before adding progesterone and scheduling the transfer.
Once your transfer is complete, progesterone support continues for roughly two weeks while you wait for a pregnancy test. Many patients start watching closely for symptoms and positive signs after embryo transfer during this window, which can feel long since early progesterone side effects, like bloating or breast tenderness, feel a lot like early pregnancy symptoms.
Dexamethasone in IVF: What Is It and Why Is It Used?
Dexamethasone is a low-dose corticosteroid that some physicians add to specific IVF protocols, particularly for patients with polycystic ovary syndrome (PCOS) or a history of a weaker response to stimulation. It’s thought to work by reducing elevated androgen levels and modulating immune activity in a way that can support follicle development and implantation.
Dexamethasone isn’t part of every protocol. It’s typically added when your physician identifies a specific hormonal or immune-related reason to include it, based on your history and prior cycle response. If it’s part of your protocol, you’ll usually take it as a low-dose oral tablet during part of the stimulation phase, sometimes continuing into the early luteal phase.
IVF Medications for Mini-IVF
RSMC also offers mini-IVF, a protocol built around lower doses of stimulation medication than a conventional IVF cycle. Instead of high-dose gonadotropin injections aimed at maximizing the number of follicles, mini-IVF typically relies on oral medications like letrozole or clomiphene, sometimes combined with a lower dose of injectable gonadotropins, to stimulate a smaller number of follicles.
The tradeoff is fewer eggs per cycle in exchange for fewer injections, a lower medication cost, and a reduced risk of OHSS. Mini-IVF tends to fit certain patients better, including those with a strong ovarian reserve who don’t need maximum stimulation, or those who haven’t responded well to high-dose protocols in the past. Your physician can help determine whether a mini-IVF medication protocol fits your fertility profile.
IVF medications play a major role in stimulating the ovaries to produce multiple eggs during an IVF cycle. These medications are essential for achieving the best outcomes during IVF treatment. By using specific fertility drugs, the process provides a greater chance of fertilization and embryo development. Understanding how these medications work and their potential effects is key to a successful journey.
Traveling for Treatment: International Medication Logistics
If you’re traveling to RSMC from outside the US, build extra lead time into your medication planning. Brand names, packaging, and availability vary by country, and not every US brand has a direct equivalent where you live. Bring your prescription details into your first conversation with your care team so they can help you work out what’s realistically available to you and how far ahead you’ll need to source it.
Trigger shot timing is exact, down to the minute, calculated backward from your retrieval time. If you’re crossing time zones mid-cycle, raise that with your care team as early as possible so your injection schedule can be adjusted without compromising egg maturation.
How Much Do IVF Medications Cost, and How to Reduce the Bill
IVF medication costs vary based on your protocol and how your ovaries respond during stimulation, since dose changes affect the total. It’s also just one piece of the overall cost of an IVF cycle in California, billed separately from retrieval, lab work, and transfer. A few factors can meaningfully reduce what you pay for medication, specifically.
IVF Medication Side Effects
Most IVF medications share a similar side effect profile: bloating, mild abdominal discomfort, mood changes, headaches, and injection site soreness. Gonadotropins tend to cause the most noticeable bloating, since your care team is actively growing multiple follicles at once and watching closely for early signs of OHSS.
- Severe abdominal pain
- Rapid weight gain
- Difficulty breathing
Frequently Asked Questions
Table of Contents
- IVF Medications at a Glance
- Phase 1: Pre-Cycle Medications
- Phase 2: Ovarian Stimulation Medications (Gonadotropins)
- FSH + LH Combination Medication: Menopur
- What Happens If You Miss a Dose or Give the Trigger Late?
- Phase 5: Post-Retrieval and Transfer Support
- Dexamethasone in IVF: What Is It and Why Is It Used?
- IVF Medications for Mini-IVF
- Traveling for Treatment: International Medication Logistics
- How Much Do IVF Medications Cost, and How to Reduce the Bill
- IVF Medication Side Effects
- Frequently Asked Questions
