Follistim AQ (follitropin beta) is a lab-made follicle-stimulating hormone (FSH) injection that tells your ovaries to mature multiple follicles at once. In an IVF cycle the typical starting dose is 200 IU per day for at least the first 7 days, which your doctor then adjusts up or down based on how your ovaries respond.
Data in this article come from the FDA-approved Follistim prescribing information (DailyMed/NIH) and peer-reviewed literature indexed in PubMed, compiled by the ProIVF Medical Editorial Team and reviewed by the ProIVF Medical Advisory Board.
If your clinic has prescribed Follistim, the usual questions are: what exactly does this injection do, what dose will I need, and how is it different from Gonal-F? This guide answers all three, with the label data behind each number.
What Does Follistim Do in IVF?
Follistim AQ is the U.S. brand name for follitropin beta, a recombinant FSH manufactured by Organon and first approved by the U.S. FDA in 1997. In a natural cycle your pituitary gland releases just enough FSH for one dominant follicle to win; IVF deliberately gives a higher FSH dose so many follicles mature at the same time — each one potentially holding an egg for retrieval.
Follistim is used for three main purposes:
| Purpose | Who it’s for | Typical dose |
|---|---|---|
| Controlled ovarian stimulation (IVF/ICSI — ICSI being intracytoplasmic sperm injection) | Women undergoing IVF to grow multiple follicles | Starting 200 IU/day, max 500 IU/day |
| Ovulation induction | Women who are anovulatory (not ovulating regularly) | Starting 50 IU/day, max 250 IU/day |
| Sperm production induction | Men with hypogonadotropic hypogonadism, alongside hCG (human chorionic gonadotropin) | 450 IU/week, split into 2–3 doses |
Name note for Chinese-speaking patients: Follistim AQ is the U.S. brand of follitropin beta. Outside the U.S., the same molecule is sold as Puregon (Chinese brand names: Pulikang / Baorenkan). If you used one overseas and your U.S. clinic prescribes the other, there is no cause for alarm: the active ingredient is identical. To see how Follistim fits into the full medication lineup, browse our IVF medications guide and self-injection guide.
How Does Follistim Fit Into an IVF Cycle?
A typical Follistim stimulation phase runs like this:
- Baseline check — on cycle day 2–3 the clinic confirms your hormone levels and antral follicle count
- Daily Follistim injection — subcutaneous (into the belly), roughly 7–12 days
- Monitoring — ultrasound and blood tests every 1–3 days track follicle growth and estradiol
- Trigger shot — once follicles reach target size (usually 17–22 mm), an hCG or Lupron (leuprolide) trigger matures the eggs
- Egg retrieval — 34–36 hours after the trigger, follicles are aspirated under anesthesia in a procedure of about 30 minutes
Depending on your protocol, Follistim may be combined with other medications:
- A GnRH antagonist (Cetrotide or ganirelix) prevents premature ovulation
- Menopur or low-dose hCG adds luteinizing hormone (LH) activity for patients who need it
- Lupron down-regulates the pituitary before stimulation in a long protocol
What Determines Your Follistim Dose?
Follistim dosing is individualized — there is no one-size-fits-all number. According to the U.S. prescribing information (FDA label, 2026 revision):
IVF / ICSI cycles (controlled ovarian stimulation):
- Starting dose: 200 IU per day, injected subcutaneously, for at least the first 7 days
- Adjustment: after day 7, your doctor raises or lowers the dose based on ultrasound follicle growth and estradiol levels
- High responders (at risk of ovarian hyperstimulation syndrome [OHSS]) may have the dose reduced or paused from day 6 onward
- Maximum daily dose: 500 IU
Ovulation induction (anovulatory women):
- Starting dose: 50 IU per day for at least 7 days
- Adjustments of 25–50 IU are made weekly based on response
- Maximum daily dose: 250 IU
Sperm production induction in men:
This applies to hypogonadotropic hypogonadism — when the pituitary makes too little FSH and LH to drive sperm production.
- Pretreatment with hCG (1,500 IU twice weekly) until testosterone normalizes
- Then Follistim 450 IU per week alongside continued hCG — either 225 IU twice weekly or 150 IU three times weekly
⚠️ Important — from the FDA label (2026): Follistim AQ doses are calculated as “actual cartridge doses,” because the Follistim Pen delivers on average 18% more follitropin beta than a traditional syringe. Never transfer a dose between brands without your clinic recalculating: Gonal-F starts at 150 IU with a 450 IU maximum in IVF, while Follistim starts at 200 IU with a 500 IU maximum.
Follistim vs Gonal-F vs Menopur: What’s the Difference?
The question patients ask most is how Follistim compares with Gonal-F, since both are FSH injections. The core differences:
| Medication | Active ingredient | Type | LH activity | Key difference |
|---|---|---|---|---|
| Follistim AQ | follitropin beta | Recombinant FSH | None | Liquid cartridge + pen; common in the U.S. |
| Gonal-F | follitropin alfa | Recombinant FSH | None | The other major FSH brand; vial or pen |
| Puregon | follitropin beta | Recombinant FSH | None | International brand of the Follistim molecule |
| Menopur | hMG (human menopausal gonadotropin) | Urine-derived | Yes | Adds LH activity; often combined with an FSH drug |
Follistim vs Gonal-F efficacy: a 2025 systematic review and meta-analysis (26 studies, 12,613 participants) compared FSH medications head to head. Follitropin alfa (Gonal-F) yielded on average 0.64 more oocytes than follitropin beta (Follistim) — 95% CI 0.09–1.19 — but fertilization, pregnancy and live birth rates were similar across medications. The tiny egg-count difference came with higher total FSH use and a slightly higher OHSS risk. Practically, the choice between Follistim and Gonal-F turns on insurance formularies, clinic habit and which injection device suits you — not on your chance of a baby.
Why choose the Follistim pen? A randomized trial of 100 IVF patients — Kang et al., 2011 — compared the Follistim Pen with a conventional syringe, both delivering the same follitropin beta solution. The pen group had a shorter stimulation, used less total medication, reported significantly less injection-site pain at 5 minutes, 1 hour and 3 hours, and rated convenience higher — with no difference in IVF outcomes. On injection experience, the pen wins outright.
How Do You Inject Follistim?
Follistim AQ comes as a pre-filled liquid cartridge that fits the Follistim Pen; some forms are also available as pre-filled syringes. Key points for pen use:
- Injection site: subcutaneous in the abdomen, rotating positions daily to avoid hardening
- Dose setting: the dose window on the pen shows the exact IU — follow the device instructions
- Timing: inject at the same time each day
- Needles: a fresh needle every injection, disposed of in a sharps container — never reused
- Missed dose: contact your clinic immediately — never double up on your own
Before your first self-injection, the clinic’s nursing team will run a teaching session and watch you do it. Most patients find it far easier than expected once started; our injection technique guide covers the details for the full stimulation phase.
What Are the Side Effects of Follistim?
The U.S. label lists the most common adverse reactions in women undergoing IVF/ICSI (occurring in ≥2%):
- Pelvic discomfort and pelvic pain
- Headache
- OHSS
- Nausea
- Fatigue
For ovulation induction, ovarian cysts and abdominal discomfort/pain are also common. In male users, the common effects are headache, acne and injection-site reactions.
OHSS: the risk you most need to understand
OHSS happens when the ovaries over-respond to stimulation — they enlarge, fluid shifts into the abdomen, and severe cases need hospitalization. The key points:
- Symptoms: rapid weight gain, severe bloating, reduced urination, nausea, shortness of breath
- Prevention: individualized starting doses — deliberately lower for high responders — and close monitoring every 1–3 days; the label explicitly allows dose reduction or pausing from day 6 in over-responders
- Response: contact your clinic immediately if symptoms appear — do not wait
Other serious but rare risks listed in the label include blood clots (pulmonary/vascular complications), ovarian torsion, multiple pregnancy, ectopic pregnancy and miscarriage. These apply to gonadotropin treatment generally, not to Follistim alone.
How Much Does Follistim Cost?
Follistim is a specialty medication and, like other recombinant FSH brands, expensive without insurance. Retail prices shift frequently by pharmacy and over time, so check a price-comparison tool or your pharmacy directly at prescription time.
As a reference point: a typical stimulation cycle uses roughly 1,500–3,500 IU of FSH in total. For Gonal-F, the directly comparable brand, verified U.S. retail prices run approximately $2,000–$6,000 per cycle before insurance or assistance (GoodRx-checked reference), and Follistim sits in a similar range. Organon runs a fertility assistance program that can reduce out-of-pocket costs for eligible patients.
Prices above are context only. Your actual cost depends on your dose, pharmacy, insurance and assistance eligibility — always confirm a live quote with your pharmacy before setting a cycle budget.
Ways to lower the cost
- Insurance: some states mandate fertility coverage; check whether your pharmacy benefit covers gonadotropins and whether prior authorization is required.
- Manufacturer assistance: eligible self-pay patients can apply to Organon’s support program — ask the pharmacy about current eligibility and discounts at prescription time.
- Treatment abroad: patients doing IVF overseas (e.g., parts of Asia or Europe) typically buy the same molecule (Puregon) at lower prices, and many clinics bundle medication into package pricing.
- Shop around: gonadotropin prices vary enormously between pharmacies — compare before deciding where to fill.
Patient Stories: Three Different Follistim Journeys
The following patient stories are shared with consent. Names and identifying details have been changed to protect privacy.
Story 1: Sarah, 34 — first cycle, New York. “The pen made the needles less scary”
Sarah started on 225 IU of Follistim daily, stimulated for 10 days, retrieved 12 eggs, and had a positive pregnancy test after her first frozen transfer.
Sarah’s clinic started her on 225 IU of Follistim daily with a Cetrotide antagonist. “Honestly, the pen made it much easier than I expected. I was terrified of needles — I’d nearly fainted giving blood. But dialing the dose and pressing a button felt completely manageable, and my husband helped with the first few injections.” By day 6 her estradiol was climbing fast and the dose dropped to 150 IU. She stimulated for 10 days total and retrieved 12 eggs, which yielded 2 blastocysts; her first frozen transfer produced a positive pregnancy test. Medication cost before insurance: about $3,800.
Story 2: Xiaomei, 38 — switched from Puregon in California. “It turned out to be the same drug”
Xiaomei switched from Puregon in China to Follistim in the U.S. — the same molecule — retrieved 7 eggs on a 300 IU start, and one blastocyst showed a heartbeat at the 8-week scan.
Xiaomei had done one IVF cycle in China using Puregon, then moved to the U.S. “My new doctor said we’d use Follistim this time and I panicked — I thought it was something completely different. He explained Follistim and Puregon are the same molecule, just different brand names in different countries. Same dose range, same technique, and the pen was actually better.” Her AMH (anti-Müllerian hormone) was 1.1 ng/mL, so the clinic chose a moderate 300 IU starting dose. She retrieved 7 eggs, 5 fertilized, and one day-5 blastocyst showed a heartbeat at the 8-week scan. With insurance, her out-of-pocket medication cost was $1,900.
Story 3: Priya, 41 — poor responder in Texas. “We watched every single unit”
After a previous cycle yielded only 3 follicles, 41-year-old Priya stimulated on 450 IU of Follistim daily, retrieved 5 eggs, and one made it to a frozen embryo.
Priya’s previous cycle with another FSH brand produced only 3 follicles. For her second attempt her doctor used 450 IU of Follistim daily plus low-dose hCG. “I knew 450 IU was close to the label maximum. The injections stung at that dose and I was visibly bloated by day 8 — they watched me closely for OHSS. But it was worth it: 5 eggs retrieved, and 1 made it to a frozen embryo.” The clinic recommended PGT-A (preimplantation genetic testing for aneuploidy), with transfer scheduled the following month. Cost with an assistance-program discount: about $4,500.
The common thread: Follistim dosing depends on your age, ovarian reserve and previous response — the “right” dose looks different for every patient.
FAQ
Q: What is the difference between Follistim and Gonal-F?
Both are pure recombinant FSH with no LH activity: Follistim contains follitropin beta, Gonal-F contains follitropin alfa. The 2025 meta-analysis found Gonal-F retrieved 0.64 more eggs on average (95% CI 0.09–1.19), but pregnancy and live birth rates were similar.
For most patients the choice comes down to insurance coverage, clinic preference and pen comfort rather than pregnancy odds. Menopur is a different class — a urine-derived hMG with LH activity, usually used alongside an FSH drug rather than instead of it.
Q: How many days do you take Follistim for IVF?
Typically 7–12 days of daily injections, depending on how fast your follicles grow. Your clinic monitors with ultrasound and blood tests and tells you when to take the trigger shot.
Q: Can Follistim be used for ovulation induction without IVF?
Yes. For anovulatory women the starting dose is 50 IU daily for at least 7 days, adjustable weekly up to 250 IU per day — far below IVF doses.
Ovulation induction aims for the follicle to mature and release the egg on its own, so no retrieval procedure is needed; the doctor monitors growth by ultrasound and times intercourse or insemination accordingly.
Q: What is the maximum Follistim dose for IVF?
The FDA label sets the maximum individualized daily dose at 500 IU for controlled ovarian stimulation in IVF/ICSI cycles. Doses near the ceiling are usually reserved for poor responders and used under close monitoring.
Q: Is Follistim the same as Puregon?
Yes — both are follitropin beta. Follistim AQ is the U.S. brand; Puregon is the international brand of the same molecule, and the IVF range of 200–500 IU per day applies to whichever brand your clinic uses.
Confirm the exact product with your pharmacist, since formulations and devices differ by region.
Q: Does Follistim cause weight gain?
Weight gain is not among the common side effects — the label’s ≥2% list for IVF users covers pelvic discomfort, headache, OHSS, nausea and fatigue, not the scale. But bloating and fluid retention during stimulation — including mild OHSS — can make you feel heavier.
Rapid weight gain of several pounds within days together with reduced urination should be reported to your clinic immediately, as it may signal OHSS.
Q: What happens if I miss a Follistim dose?
Contact your clinic right away. Depending on which day of the 7–12-day stimulation you are on, they may have you take it immediately or adjust the plan.
Never double the dose without instructions.
How to Plan Your Follistim Cycle
Starting an IVF cycle takes more than picking up a prescription. Before your first Follistim injection:
- Confirm the protocol with your clinic — starting dose, injection time and monitoring schedule, all spelled out
- Check insurance early — FSH medication is a major cost center; verify prior authorization, specialty-pharmacy requirements and assistance programs before starting
- Prepare your supplies — sharps container, alcohol swabs, and a fixed daily injection time
- Let the nurse teach your first injection — most clinics offer a training session; take it
- Block time for monitoring — ultrasounds every 1–3 days are not optional; arrange work and travel around them
- Compare clinics transparently — medication is only part of a cycle; what matters most is a clinic’s overall success rates, monitoring quality and price transparency. ProIVF helps you compare reproductive centers in our global hospital list using each clinic’s published success rates, patient reviews and service packages.
Follistim is one of the most widely used and best-studied FSH medications in IVF. Understanding what it does, how your dose is decided and what to watch for takes much of the anxiety out of the stimulation phase. When you are ready to choose a clinic, browse the ProIVF hospital directory to compare fertility centers worldwide, or contact our team for guidance.
This article was written by the ProIVF Medical Editorial Team and reviewed by the ProIVF Medical Advisory Board. It is based on the FDA-approved Follistim prescribing information (DailyMed) and peer-reviewed literature indexed in PubMed, and aims to provide objective, accurate information for readers.
This article is for educational reference only and does not constitute medical advice. For diagnosis and treatment decisions, consult a licensed reproductive endocrinologist. Last updated: September 4, 2026.
