Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
A.P.L. vs PREGNYL
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
A. P. L. (Chorionic Gonadotropin) acts as a luteinizing hormone (LH) agonist, binding to LH receptors in the gonads to stimulate testosterone production in males and ovulation in females.
Human chorionic gonadotropin (h CG) acts as a luteinizing hormone (LH) agonist, binding to LH receptors in the gonads, stimulating testosterone production in males and ovulation in females.
Induction of ovulation in anovulatory infertile women,Treatment of hypogonadism and cryptorchidism in males,Off-label: Assisted reproductive technology (ART) protocols
FDA: Treatment of prepubertal cryptorchidism,FDA: Induction of ovulation and pregnancy in anovulatory infertile women,Off-label: Hypogonadotropic hypogonadism in males,Off-label: Assisted reproductive technology (ART) protocols
500-1000 mg every 4-6 hours, not to exceed 3000 mg/day in adults.
Intramuscular injection: 5,000-10,000 IU once weekly for 4-9 weeks for ovulation induction; 1,000-2,000 IU three times weekly for spermatogenesis.
Terminal elimination half-life: 2.5–3.5 hours (elimination phase); clinical context: requires repeated dosing for sustained effect.
Terminal elimination half-life: 23–24 hours; clinically, supports daily or every-other-day dosing; peak effect may lag due to prolonged absorption
Primarily via glucuronidation (60%) and sulfation (35%) in the liver, with a minor portion (5%) via CYP2E1 oxidation to the toxic metabolite N-acetyl-p-benzoquinone imine (NAPQI), which is normally detoxified by glutathione.
Primarily renal metabolism and excretion; limited hepatic metabolism.
Renal: 10% unchanged; hepatic metabolism to inactive metabolites excreted in urine and feces (90% combined).
Renal: 10-20% as unchanged drug; hepatic metabolism to inactive metabolites; fecal excretion negligible (<5%)
80–90% bound to sex hormone-binding globulin (SHBG) and albumin.
~80% bound primarily to albumin; minor binding to sex hormone-binding globulin (SHBG)
0.5–0.9 L/kg, indicating moderate tissue distribution (primarily gonads and liver).
0.5–0.7 L/kg; moderately distributed into extracellular fluid; penetrates gonadal tissues
IM: 100%; Subcutaneous: ~80% (relative to IM); Oral: <5% (not clinically used).
Intramuscular: ~100%; Subcutaneous: comparable (~95-100%); Oral: <5% (not used)
No specific adjustment required for mild to moderate renal impairment. In severe renal impairment (Cr Cl < 10 m L/min), extend dosing interval to every 8 hours.
No specific guidelines; use with caution in severe renal impairment (Cr Cl <30 m L/min) due to limited data.
Caution in severe hepatic impairment; consider dose reduction or extended interval. Avoid use in active liver disease.
No specific guidelines for Child-Pugh; use with caution in severe hepatic impairment.
Weight-based: 10-15 mg/kg every 4-6 hours, not to exceed 5 doses per day or 75 mg/kg/day.
Not indicated for prepubertal children; for delayed puberty in males: 1,000-2,000 IU intramuscularly 2-3 times weekly for 3-6 months.
No specific dose adjustment, but consider renal and hepatic function and avoid exceeding 3000 mg/day.
No specific recommendations; use lowest effective dose due to potential increased sensitivity and comorbidities.
No black box warning.
No FDA black box warning.
May cause fluid retention, ovarian hyperstimulation syndrome (OHSS) in females,Increased risk of thromboembolic events,Precocious puberty in males,Not for use in prepubertal children unless for cryptorchidism
Ovarian hyperstimulation syndrome (OHSS) in women,Arterial thromboembolism,Precocious puberty in males,Fluid retention,Ovarian enlargement or cyst rupture
Hypersensitivity to chorionic gonadotropin or any component,Precocious puberty (in males),Prostatic carcinoma or other androgen-dependent neoplasms,Ovarian cyst or enlargement not due to polycystic ovary syndrome
Hypersensitivity to h CG or any component,Premature epiphyseal closure in males,Androgen-dependent neoplasia (e.g., prostate cancer),Undiagnosed uterine bleeding,Ovarian cyst or enlargement due to polycystic ovarian syndrome (PCOS),Active thromboembolic disorders
No known food interactions. Avoid alcohol during treatment.
No known clinically significant food interactions. Maintain usual diet unless advised otherwise by physician.
A. P. L. (chorionic gonadotropin) is not expected to increase the risk of congenital anomalies when used in early pregnancy. However, use in the first trimester is generally avoided unless indicated for specific conditions. Data are limited; no increased fetal risk reported in inadvertent exposures. Second and third trimester use is not associated with teratogenicity but may increase risk of multiple gestation (if used for ovulation induction).
Pregny (h CG) is not indicated for use during pregnancy. h CG is used to induce ovulation and is not continued after conception. In animal studies, high doses have shown fetal abnormalities, but human data are insufficient. First trimester: No direct fetal risk from therapeutic use as it is discontinued before implantation. Second/Third trimester: Not used. Overall, classified as FDA Pregnancy Category X for ovulation induction (contraindicated in pregnancy) but no teratogenic risk if discontinued before conception.
Chorionic gonadotropin is not detected in breast milk following maternal administration. M/P ratio not established. Considered compatible with breastfeeding; no adverse effects on infant reported. Use with caution if high doses are administered.
Human chorionic gonadotropin (h CG) is normally present in breast milk in low concentrations. Exogenous h CG is likely excreted into breast milk, but the M/P ratio is not established. Due to lack of data and potential for adverse effects in the infant (e.g., hormonal disruption), breastfeeding is not recommended during therapy. The manufacturer advises discontinuing breastfeeding or avoiding the drug.
No pharmacokinetic studies in pregnancy. Dose adjustments are not typically required during pregnancy for standard indications. For ovulation induction, dosing is based on follicular development. In first trimester for luteal support, standard doses are used. No evidence of altered clearance or need for dose changes due to pregnancy.
Pregny is contraindicated in pregnancy. No dose adjustment is applicable as it is discontinued prior to conception. There are no pharmacokinetic data for pregnancy, but the drug is not used during gestation.
A. P. L. (chorionic gonadotropin) is used to trigger ovulation in assisted reproductive technology. Administer when follicles are mature (≥18 mm). Risk of ovarian hyperstimulation syndrome (OHSS) increases with higher doses. Monitor for abdominal pain, distension, and weight gain. Use caution in patients with prior thromboembolism.
Pregnyl (h CG) is used to trigger final follicular maturation and ovulation in assisted reproduction. Monitor for ovarian hyperstimulation syndrome (OHSS); consider withholding h CG if estradiol >4000 pg/m L or >20 follicles per ovary. Administer exactly 36 hours before oocyte retrieval. Intramuscular injection into gluteal muscle; rotate sites if repeated doses.
This medication is given as an injection exactly as prescribed to trigger ovulation.,A single dose is usually sufficient; follow your doctor's timing instructions closely.,Common side effects include headache, fatigue, and injection site reactions.,Seek immediate medical help if you experience severe pelvic pain, nausea, vomiting, or sudden weight gain (signs of OHSS).,Report symptoms of blood clots: leg pain, chest pain, or shortness of breath.
Use Pregnyl exactly as prescribed to trigger ovulation; timing is critical for egg retrieval.,Report severe pelvic pain, bloating, nausea, or rapid weight gain (possible OHSS) immediately.,Avoid pregnancy tests during treatment as h CG may cause false positive.,May cause injection site pain or swelling; apply warm compress if needed.,Do not discontinue without consulting your fertility specialist.
No interactions on record
No interactions on record
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about A.P.L. vs PREGNYL, answered by our medical review team.
A.P.L. is a Gonadotropin that works by A. P. L. (Chorionic Gonadotropin) acts as a luteinizing hormone (LH) agonist, binding to LH receptors in the gonads to stimulate testosterone production in males and ovulation in females.. PREGNYL is a Gonadotropin Hormone that works by Human chorionic gonadotropin (h CG) acts as a luteinizing hormone (LH) agonist, binding to LH receptors in the gonads, stimulating testosterone production in males and ovulation in females.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between A.P.L. and PREGNYL depend on the specific clinical indication. These are agents from distinct pharmacological classes and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of A.P.L. is: 500-1000 mg every 4-6 hours, not to exceed 3000 mg/day in adults.. The standard adult dose of PREGNYL is: Intramuscular injection: 5,000-10,000 IU once weekly for 4-9 weeks for ovulation induction; 1,000-2,000 IU three times weekly for spermatogenesis.. Dosing should always be individualized based on indication, renal and hepatic function, age, and other patient factors.
No direct drug-drug interaction has been formally documented between A.P.L. and PREGNYL in current clinical databases. However, individual patient risk factors including other medications, organ function, and comorbidities should always be evaluated by a qualified healthcare provider.
The maternal-fetal safety profiles differ. A.P.L. is classified as Category C. A.P.L. (chorionic gonadotropin) is not expected to increase the risk of congenital anomalies when used in early pregnancy. However, use in the first trimester is generally avoided . PREGNYL is classified as Category C. Pregny (hCG) is not indicated for use during pregnancy. hCG is used to induce ovulation and is not continued after conception. In animal studies, high doses have shown fetal abnorm. Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.