STUDresearch · Peptide
rFSH (Follitropin alfa)
Also known as
Gonal-F · Gonal-f RFF / Gonal-f pen · recombinant FSH · follitropin alfa · Follistim / follitropin beta (sister product, not identical) · Puregon (beta, regional) · Foligraf (regional rFSH kit talk)
Community talk. May be wrong. Not medical advice. Not a protocol. Not for human or animal use.
Peptide
Some talk
Systemic
SubQ
Sexual / reproductive
Systemic glycoprotein hormone (recombinant FSH).
What people say
Follitropin alfa is recombinant follicle-stimulating hormone. Gonal-F is labeled with hCG for spermatogenesis in hypogonadotropic men; this differs from hMG and from off-label attempts to preserve fertility while continuing TRT.
Doses people talk about
These are indication- and population-specific contexts, not a progression; IU amounts cannot be moved between male and female treatment goals without the associated monitoring and label conditions.
How it may feel
The inspected reports do not establish an immediate drug-like sensation. Male label trials with hCG reported acne, injection-site pain, fatigue, gynecomastia, seborrhea and decreased libido. The outcome of interest is semen analysis over months; forum reports range from continued azoospermia to rare sperm or improved counts amid hCG, prior or continued TRT and amount changes.
US labeled male combination150 IU Gonal-F SC three times weekly with hCG 1,000 IU (or the dose needed to maintain normal testosterone) three times weekly; Gonal-F up to 300 IU three times weekly if azoospermia persists
Labeled hypogonadotropic-male context after hCG pretreatment has normalized testosterone; use is individualized to the lowest effective dose and may continue up to 18 months.
EMA labeled male combination150 IU three times weekly with hCG for at least 4 months
European product-information context; later continuation may be needed for response.
TRT-on-board community range75 IU every other day or 75–150 IU two to three times weekly with hCG
Off-label forum and clinic-extension context with TRT and hCG confounding outcomes.
Single journey claim75 IU every other day, later 125 IU every other day
One reported Gonal-F or Foligraf journey with hCG and TRT still present; not a protocol.
Female ovarian-stimulation contextAbout 75–150 IU daily, with some programs up to 450 IU/day
Different population, endpoint and monitoring burden; not transferable to male fertility use.
Half-life & effect duration
- Half-life in the body
- Under-the-skin injection · EMA rangeAbout 24–59 hours
- Single-dose US study · womenAbout 24 hours
- Single-dose US study · menAbout 41 hours
- Repeated-dose US studiesAbout 24 hours in women; 32 hours in men
- IV · terminal phaseAbout 14–17 hours
- Felt duration people report
- Immediate experiencesInjection-site discomfort
- Fertility reportsSemen changes assessed after 3–6 months; positive and null accounts
Cycles people discuss
Male labeling and forum reports describe months of treatment, not a short performance cycle. hCG pretreatment and whether TRT continues materially change the clinical context and attribution.
Timing
EMA product information reports a 24–59-hour apparent SC terminal half-life, about three-fold accumulation and steady state within 3–4 days. The checked US table gives condition-specific single-dose means of 24±11 hours in healthy down-regulated female volunteers and 41±14 hours in healthy men; this measured PK is separate from subjective duration and the label-specific male treatment calendar.
Stacks
hCG is part of the labeled male combination. Continuing TRT or using enclomiphene after stopping TRT are distinct clinical pathways and major confounders in community reports.
Watch for
Primary testicular failure: The US label excludes primary testicular failure and high FSH indicating primary gonadal failure; it requires confirmation of azoospermia and hypogonadotropic hypogonadism before treatment. Preserved forum discussion also calls for baseline FSH/LH and semen analysis.
Tap a line to jump into the full notes. Research only — may be wrong.
Timing context & sources
Half-life in the body
The EMA reports an apparent SC terminal half-life of 24–59 hours. The US Gonal-F table reports SC terminal half-life estimates of 24±11 hours after 150 IU in healthy down-regulated female volunteers and 41±14 hours after 225 IU in healthy men; repeated-dose estimates were 24±8 and 32±4 hours.
The EMA separately reports an initial IV phase around 2 hours, terminal IV half-life of 14–17 hours, about three-fold accumulation after repeated dosing and steady state within 3–4 days. The US label notes absorption-rate-limited SC kinetics.
The EMA 24–59-hour apparent-SC range and the US table's condition-specific means are different summaries; neither is one universal individual value or a felt-duration window. Dose, sex, repetition, route and product matter, and half-life alone does not determine the indication-specific schedule.
- DailyMed — Gonal-F follitropin alfa prescribing information (opens in a new tab)Dosage, patient selection, adverse reactions and clinical pharmacology: after hCG pretreatment, men receive 150 IU Gonal-F SC three times weekly with hCG 1,000 IU or the dose needed to maintain normal testosterone, with Gonal-F up to 300 IU three times weekly if azoospermia persists, using the lowest effective dose for up to 18 months; exclude primary testicular failure or high FSH indicating primary gonadal failure and confirm azoospermia plus hypogonadotropic hypogonadism. Male trials used hCG and reported gynecomastia in 4/63 (6%), including one serious case requiring surgery after nine months. The PK table gives sex-, dose- and repeat-specific half-lives, SC bioavailability and absorption-rate-limited disposition.Product label populations and conditions; combination trials do not assign gynecomastia to FSH versus hCG/testosterone effects and do not establish outcomes for men continuing supraphysiologic TRT or interchangeability with other FSH products.
- EMA — GONAL-f product information (opens in a new tab)Sections 4.2 and 5.2: men with hypogonadotropic hypogonadism receive 150 IU three times weekly with hCG for at least four months; IV initial and terminal half-lives are about 2 and 14–17 hours; after SC administration, apparent terminal half-life is 24–59 hours, with about three-fold accumulation and steady state within 3–4 days.European label across several formulations and indications; IV kinetics are not the same as SC terminal estimates or a felt-effect clock.
Felt duration people report
No single felt-duration window is established; immediate reports focus on injection-site burden, while the outcome of interest is semen analysis after months.
One r/maleinfertility thread described recombinant FSH use for about five months and a low but nonzero total count at month four. Another poster remained azoospermic after earlier hCG and several months of 75 IU Gonal-F three times weekly, then later reported rare sperm below one million per milliliter; a commenter described improvement after three months with daily FSH plus hCG and TRT.
Small unverified reports with different baseline diagnoses, prior TRT, hCG, continued TRT, amounts and follow-up. Semen outcomes are not felt effects and do not establish causality or typical response time.
- Reddit r/maleinfertility — Gonal-F solo (opens in a new tab)Thread includes an rFSH-only user with nearly azoospermic baseline reporting five months of use and a 3.7-million total count at month four; the original author had prior hCG and clomiphene failures and no clear outcome update.Anonymous reports, incomplete dose and diagnosis detail, different prior treatments and no verified records or conception outcome.
- Reddit r/maleinfertility — No sperm after 8 months on hCG and FSH (opens in a new tab)Original post described prior TRT, hCG followed by Gonal-F 75 IU three times weekly and persistent azoospermia; a later update reported rare sperm below one million per milliliter, while a commenter described a different daily FSH plus hCG/TRT result at three months.Different people and regimens, continued or prior TRT and hCG confounding, unverified semen results, no controlled comparator and no common baseline diagnosis.
What people say
- Sperm shows up after hCG-alone failed: “No sperm after 8 months on HCG + … add FSH 75 IU. It can take 6–12 months.” Repeating r/maleinfertility line. forum
- A named journey (2026): One r/maleinfertility writeup ran Gonal-F 900 / Foligraf kits at 75 IU EOD on T-pin days, then 125 IU EOD, with hCG and TRT still on. That is a log, not a protocol. anecdote
- Volume / “fuller” testes: With hCG, people describe less shrinkage than TRT solo. FSH is credited for the sperm side more than the size side. forum
- Return-of-sperm stats people quote: ~most men see sperm back within a year *off* TRT. On-TRT salvage is the harder, more expensive fight — that is why Tatem names FSH. forum
- Labeled male combo: Gonal-F 150 IU 3×/week + hCG, after T is brought up with hCG first, for months (EMA: minimum ~4 months). trial
Doses people talk about
- TRT-on-board community: 75 IU EOD or 75–150 IU 2–3×/week next to hCG. FYR-style explainers quote 75–150 IU FSH. forum
- Ramp logs: 75 IU EOD → 125 IU EOD on T days in one 2026 journey. anecdote
- Pens / kits: Gonal-F 300/450/900 IU pens; multi-dose 600/1200. People talk “clicks,” not reconstitution theater, on modern pens. forum
- Framing: Clinic IU and fertility-forum bands — not a peptide mcg chart. forum
- EMA male: 150 IU 3×/week with hCG for at least 4 months. trial
- Female/IVF (do not import): Start ~75–150 IU daily, titrate, ceiling ~450 IU/day. That is ovaries, not TRT. trial
- Labeled male (Gonal-F + hCG): 150 IU SC 3×/week with hCG ~1000 IU 3×/week (US-style summaries); max often discussed 300 IU 3×/week. Pretreat with hCG to normalize T first in the insert story. trial
How it may feel
- No buzz: This is not Cialis. Pins, bruise, and a credit-card sting. forum
- Weeks 1–4: Site reactions. Semen analysis will not move yet — spermatogenesis is a ~70-day factory. forum
- Months 3–6: First SA that people treat as a real read. Some still zero and stay the course to month 8–12. forum
- Month 6–12: The “is this working” cliff. Forums say do not call it at week 6. forum
- Mood / E2: Adding FSH on top of hCG + TRT can nudge aromatization via the hCG/T side, not because FSH is an estrogen. AI panic is usually the hCG. forum
- Stop: Sperm can fall again if TRT stays on and the FSH/hCG come off. forum
Cycles people discuss
- Months, not weeks: Sperm cycle ~70 days. Logs run 3–12 months before a hard no. forum
- Stay on TRT vs come off: Two religions. Come-off + hCG is cheaper; stay-on + hCG + FSH is the Tatem-shaped ask. forum
- Not a forever TRT add-on for most: Cost. People run it for a conception window. forum
- hCG first, then FSH: Common clinic order if T is still low. trial
Timing
- SA timing: Dose schedule ≠ semen calendar. Recheck in months. forum
- SC terminal half-life: EMA product information reports an apparent SC terminal half-life of 24–59 hours. The checked US table reports 24±11 hours after one 150 IU dose in healthy down-regulated women and 41±14 hours after one 225 IU dose in healthy men; repeated-dose estimates were 24±8 and 32±4 hours. These product-, population- and condition-specific values are not one universal individual range. trial
- IV and SC context: The EMA product information reports an initial IV phase around 2 hours and terminal half-life of 14–17 hours; the US table reports SC absolute bioavailability of 66±39% only for the 150 IU healthy-female condition. trial
- Schedule is label-specific: The US and EMA male indications use Gonal-F three times weekly with hCG; that labeled rhythm should not be reverse-engineered from half-life alone or generalized to other fertility populations. trial
More on what it is
- Why people talk about it: Dr. Alex Tatem’s 2026 TRT-fertility talk is FSH + hCG, not hCG alone. r/maleinfertility is full of “hCG brought T back, still azoospermic until we added Gonal-F.” forum
- Not HMG: Menopur / hMG is FSH+LH from urine. rFSH is FSH only. Your existing HMG card is the mixed product. Do not treat 75 IU hMG as 75 IU Gonal-F plus nothing else. forum
- What it is: Recombinant FSH (follitropin alfa). Gonal-F is the pen people name. A real fertility drug, not a Khavinson short peptide. trial
- How it works (plain): hCG (or LH) makes intra-testicular testosterone. FSH runs the Sertoli / sperm-factory side. TRT shuts both. hCG covers one; rFSH is the missing second signal. trial
- Two IU worlds: Male TRT-fertility logs live at 75–150 IU a few times a week. IVF daily 150–450 IU is a different job. trial
- Evidence: Labeled with hCG for spermatogenesis in hypogonadotropic men. TRT-on-board use is clinic/off-label extension of that logic — lots of logs, not one giant RCT of “stay on your 200 mg/week and add Gonal.” trial
Stacks
- + hCG: The stack. FSH without intra-testicular T is the usual “why am I still zero?” miss. forum
- + TRT still on: The expensive fertility-preserving ask. forum
- + enclomiphene after coming off: Different restart path — not the same as rFSH. forum
- Not + HMG at the same time as a default: Pick a gonadotropin story. forum
Storage notes
- Pens: Finished. Fridge for unused pens is the usual pharmacy line; in-use rules are product-specific. forum
- No STUD mix math. Multi-dose vials follow the insert, not a bac-water meme. forum
Watch for
- Injection site: Red, itch, bruise — the daily reality. forum
- Cost / access: The limiter. 900 IU kits add up fast at 75–150 IU a pop. forum
- Gray “FSH vials”: Not Gonal-F. Identity risk. forum
- Time: Calling it at 8 weeks is how people quit a 70-day factory. forum
- Gynecomastia / estrogen context: In male Gonal-F trials, participants received hCG and 4/63 (6%) reported gynecomastia; one serious case required surgery after nine months. The combination design does not assign the event to FSH versus hCG/testosterone effects. trial
- OHSS (female/IVF world): Real on high daily IU. Not the male 75 IU story — do not mix the AEs. trial
- Primary testicular failure: The US label excludes primary testicular failure and high FSH indicating primary gonadal failure; it requires confirmation of azoospermia and hypogonadotropic hypogonadism before treatment. Preserved forum discussion also calls for baseline FSH/LH and semen analysis. trial
Evidence mix
Mostly community / anecdote tags
Full: every bullet (trial + community). Use Scan for a faster bro-science read.