Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Clomiphene (Clomid) | hCG (Human Chorionic Gonadotropin) | |
|---|---|---|
| Category | Hormones | Hormones |
| Standard Dose | Research indicates 25-50 mg daily or every other day for PCT/HPTA restart protocols. Clinical hypogonadism treatment: 25-50 mg daily. | Research indicates 250-500 IU administered subcutaneously 2-3 times per week as a TRT adjunct for fertility and testicular maintenance. |
| Timing | Take at the same time daily. Evening dosing may reduce perception of visual side effects. No food timing requirements. | Administer on non-testosterone injection days if using twice-weekly TRT split. Consistent schedule (e.g., Tuesday/Saturday). Refrigerate reconstituted solution; use within 30-60 days. |
| Cycle Duration | PCT protocols: 4-8 weeks. Long-term SERM monotherapy: 3-12 months with periodic reassessment. Zuclomiphene accumulation is a concern beyond 6 months. | Ongoing for as long as TRT continues and fertility preservation is desired. Can be used in 4-8 week pre-PCT bursts to 'prime' testicular recovery. |
| Evidence Level | moderate_human | strong_human |
Clomiphene citrate is a racemic mixture of enclomiphene (trans-isomer, estrogen antagonist) and zuclomiphene (cis-isomer, weak estrogen agonist) that acts as a selective estrogen receptor modulator (SERM). It competitively occupies hypothalamic estrogen receptors, blocking the negative feedback of estradiol on GnRH pulse frequency. This disinhibition increases pulsatile GnRH release, stimulating anterior pituitary gonadotrope secretion of both LH and FSH, which in turn drives testicular testosterone synthesis and spermatogenesis. The zuclomiphene isomer has a much longer half-life (~30 days vs. ~10 days for enclomiphene), leading to tissue accumulation with chronic use.
Research indicates 25-50 mg daily or every other day for PCT/HPTA restart protocols. Clinical hypogonadism treatment: 25-50 mg daily.
Take at the same time daily. Evening dosing may reduce perception of visual side effects. No food timing requirements.
PCT protocols: 4-8 weeks. Long-term SERM monotherapy: 3-12 months with periodic reassessment. Zuclomiphene accumulation is a concern beyond 6 months.
hCG mimics luteinizing hormone (LH) by binding the LH/CG receptor on testicular Leydig cells, activating the cAMP-PKA signaling cascade that upregulates steroidogenic acute regulatory protein (StAR) and CYP11A1, driving cholesterol conversion to pregnenolone and downstream testosterone synthesis. By maintaining intratesticular testosterone (ITT) levels during exogenous testosterone administration, hCG preserves Leydig cell function, spermatogenesis, testicular volume, and the production of neurosteroids (pregnenolone, DHEA) and estradiol within the testes.
Research indicates 250-500 IU administered subcutaneously 2-3 times per week as a TRT adjunct for fertility and testicular maintenance.
Administer on non-testosterone injection days if using twice-weekly TRT split. Consistent schedule (e.g., Tuesday/Saturday). Refrigerate reconstituted solution; use within 30-60 days.
Ongoing for as long as TRT continues and fertility preservation is desired. Can be used in 4-8 week pre-PCT bursts to 'prime' testicular recovery.
Take our free assessment to get personalized recommendations based on your health goals, current stack, and biomarkers.
Get Your Free Protocol →or take the assessment →