Definition — Oligospermia কাকে বলে?

Oligospermia বা সঠিক টার্ম oligozoospermia হলো semen analysis-এ sperm concentration কম থাকা। WHO 2021 reference অনুযায়ী sperm concentration <16 million/mL হলে low sperm concentration ধরা হয়। Total sperm number <39 million per ejaculate হলেও fertility potential কমতে পারে। Semen report একা fertility/infertility নিশ্চিত করে না; clinical context ও repeat semen analysis জরুরি।

Clinical grading — practical use:

• Mild: 10–16 million/mL
• Moderate: 5–10 million/mL
• Severe: <5 million/mL
  AUA/ASRM guideline severe oligozoospermia <5 million/mL হলে genetic evaluation বিবেচনা করতে বলে, বিশেষ করে elevated FSH বা testicular atrophy থাকলে।

---

2. Causes — কারণ

A. Pre-testicular / hormonal cause

• Hypogonadotropic hypogonadism — LH/FSH কম, testosterone কম।
• Hyperprolactinaemia — prolactin বেশি হলে GnRH suppression হয়ে sperm production কমতে পারে।
• Obesity, diabetes, thyroid disease, chronic systemic illness।
• Pituitary tumour, anabolic steroid বা testosterone misuse।

B. Testicular cause

• Varicocele — common correctable cause।
• Undescended testis / cryptorchidism history।
• Mumps orchitis, testicular trauma, torsion।
• Chemotherapy, radiotherapy।
• Genetic cause — Klinefelter syndrome, Y-chromosome microdeletion।
• Smoking, alcohol, cannabis, heat exposure, pesticides/heavy metals।
• Idiopathic — অনেক ক্ষেত্রে clear cause পাওয়া যায় না।

C. Post-testicular / obstructive cause

• Epididymal obstruction, vas deferens obstruction।
• Ejaculatory duct obstruction।
• Retrograde ejaculation।
• Infection / STI / prostatitis / epididymitis।

AUA/ASRM guideline অনুযায়ী history, physical examination ও semen analysis দিয়ে male factor evaluation শুরু করা উচিত; abnormal semen parameter থাকলে male reproductive specialist evaluation দরকার।

---

3. Symptoms — লক্ষণ

• বেশিরভাগ ক্ষেত্রে কোনো সরাসরি symptom থাকে না।
• প্রধান presentation: ১ বছর regular unprotected intercourse-এর পরও pregnancy না হওয়া।
• Associated symptoms থাকতে পারে:
  • Low libido, erectile dysfunction — testosterone deficiency সন্দেহ।
  • ছোট testis, body hair কম, gynecomastia — endocrine/testicular failure।
  • Scrotal heaviness বা dragging pain — varicocele।
  • Dysuria, urethral discharge, testicular pain — infection/STI।
  • Semen volume খুব কম — obstruction বা retrograde ejaculation সন্দেহ।

---

4. Clinical Diagnosis — clinically কীভাবে diagnosis করবেন?

• Diagnosis একবারের semen report দেখে final করা উচিত নয়। Semen parameter biological variation করে; abnormal হলে ideally কমপক্ষে ২টি semen analysis, প্রায় ১ মাস gap রেখে করা উচিত।
• History নিতে হবে:
  • Infertility duration, previous pregnancy history।
  • Coital frequency ও fertile-window timing।
  • Erectile/ejaculatory dysfunction।
  • Fever in last 2–3 months।
  • Smoking, alcohol, cannabis, anabolic steroid/testosterone use।
  • Heat exposure: sauna, hot bath, tight underwear, laptop on lap।
  • Mumps orchitis, cryptorchidism, testicular trauma/surgery।
  • STI/prostatitis/epididymitis history।
  • Drug history: testosterone, anabolic steroid, chemotherapy, sulfasalazine, finasteride, spironolactone।
  • Female partner age ও fertility evaluation parallel করতে হবে; AUA/ASRM দুজন partner-এর concurrent assessment recommend করে।
• Physical examination:
  • BMI, waist circumference।
  • Secondary sexual characters।
  • Testicular volume।
  • Epididymis ও vas deferens palpation।
  • Standing position + Valsalva দিয়ে varicocele examination।
  • Gynecomastia।
  • Thyroid/endocrine features।

---

5. Investigations — পরীক্ষা

• Semen analysis
  • Abstinence: ২–৭ দিন।
  • Complete sample collection।
  • WHO-standard lab।
  • Parameters: semen volume, sperm concentration, total sperm number, motility, morphology, vitality, pH, round cell/WBC।
  • WHO 2021 lower reference: volume 1.4 mL, total sperm number 39 million/ejaculate, sperm concentration 16 million/mL, progressive motility 30%, morphology 4%, vitality 54%, pH ≥7.2।
• Hormonal profile
  • Morning total testosterone।
  • FSH, LH।
  • Prolactin।
  • TSH।
  • Estradiol — obesity/gynecomastia/high aromatization সন্দেহে।
  • AUA/ASRM oligozoospermia, azoospermia, impaired libido, ED, atrophic testes বা hormonal abnormality থাকলে FSH ও testosterone testing recommend করে।
• Genetic tests
  • Karyotype।
  • Y-chromosome microdeletion।
  • Indication: primary infertility + azoospermia বা severe oligozoospermia <5 million/mL with high FSH/testicular atrophy।
• Infection / STI work-up
  • Urine R/E, urine culture।
  • Semen WBC / leukocytospermia।
  • Urethral discharge থাকলে NAAT for Chlamydia trachomatis ও Neisseria gonorrhoeae।
  • HIV, syphilis, HBV/HCV as indicated।
• Imaging
  • Scrotal Doppler ultrasound: varicocele, testicular volume, mass, epididymal pathology।
  • TRUS: low semen volume, acidic semen, absent/low fructose, ejaculatory duct obstruction suspicion।
  • Pituitary MRI: prolactin persistently high অথবা hypogonadotropic hypogonadism সন্দেহে। AUA/ASRM persistently elevated prolactin without exogenous cause হলে MRI indicated বলে।
• Sperm DNA fragmentation
  • Routine initial test নয়।
  • Recurrent pregnancy loss, repeated ART failure, unexplained infertility বা severe oxidative stress suspicion থাকলে consider করা যায়; AUA/ASRM initial evaluation-এ routine sperm DNA fragmentation recommend করে না।

---

6. Treatment / Management

A. General management — সব patient-এর জন্য

• Smoking, alcohol, cannabis, anabolic steroid/testosterone বন্ধ।
• Weight reduction, regular exercise, good sleep।
• Heat exposure কমানো: sauna, hot bath, tight underwear, laptop on lap avoid।
• Diabetes, thyroid disease, infection, varicocele, hormonal disorder treat করা।
• Semen improvement দেখতে সাধারণত ৩ মাস সময় লাগে, কারণ spermatogenesis cycle প্রায় ৭৪ দিন।
• Fertility চাইলে testosterone injection/gel/capsule monotherapy দেওয়া যাবে না; exogenous testosterone LH/FSH suppress করে sperm production কমিয়ে severe oligospermia বা azoospermia করতে পারে। AUA/ASRM current/future fertility চাইলে testosterone monotherapy না দিতে বলে।

---

B. Pharmacological treatment — generic name, dose, duration, side effect, interaction

Note: নিচের ডোজগুলো adult clinical practice-এর commonly used range। Patient-এর semen report, hormone profile, renal/liver status, female partner factor ও local availability অনুযায়ী urologist/andrologist dose ঠিক করবেন।

---

1. Coenzyme Q10

• Drug description: Antioxidant; mitochondrial energy production ও oxidative stress কমাতে সাহায্য করতে পারে।
• Capsule 1.ResQ 200mg AS A Coenzyme Q10(Ubidecarenone) AS A Herbal and Nutraceuticals, Supplements & adjuvant therapy.
• Indication: Idiopathic oligozoospermia বা oxidative stress suspected case-এ adjunct; cure হিসেবে নয়।
• Dose: 100–200 mg orally once or twice daily; commonly total 200–300 mg/day।
• Duration: 3–6 months; তারপর repeat semen analysis।
• Side effects: Dyspepsia, nausea, loose stool, headache, insomnia।
• Interaction: Warfarin-এর anticoagulant effect alter করতে পারে; insulin/diabetes drug-এর সাথে glucose monitoring দরকার হতে পারে। NCCIH CoQ10-এর warfarin ও insulin interaction উল্লেখ করেছে।
• Evidence note: AUA/ASRM antioxidant/vitamin supplement-এর benefit “questionable clinical utility” বলে; specific agent recommend করার মতো evidence যথেষ্ট নয়।

---

2. L-carnitine / Levocarnitine

• Drug description: Mitochondrial fatty-acid transport support করে; sperm energy metabolism ও motility support করতে পারে।
• Capsule 1.ProFertil AS A L- carnitine,L-arginine+ Coenzyme Q10 +Vitamin E+Zinc+Folic Acid +Glutathione +Selenium AS A Drugs for Infertility.
• OR

TABLET 2.Levocar 330 mg AS A Levocarnitine AS A Drugs for muscular energy metabolism

•  
• Indication: Idiopathic oligo-asthenozoospermia বা oxidative stress suspected case।
• Dose: 1–2 g orally daily; অনেক protocol-এ 2–3 g/day divided dose।
• Duration: 3–6 months।
• Side effects: Nausea, abdominal cramp, diarrhea, fishy body odour; seizure disorder থাকলে caution।
• Interaction: Warfarin-এর সাথে bleeding risk বাড়তে পারে; INR monitoring দরকার।
• Evidence note: Supplement হিসেবে ব্যবহার হলেও guideline-level evidence limited; cause-specific treatment বেশি গুরুত্বপূর্ণ।

---

3. Zinc

• Drug description: Trace element; testosterone metabolism ও spermatogenesis-এ ভূমিকা আছে; deficiency থাকলে বেশি logical।
• Tablet 1.Xinc 20 mg AS A Zinc sulfate Monohydrate AS A Specific mineral preparations, Vaccines, Anti-sera & Immunoglobulin.
• Indication: Zinc deficiency, poor diet, idiopathic infertility adjunct।
• Dose: Elemental zinc 20–40 mg orally daily।
• Duration: 3 months; long-term high dose avoid।
• Side effects: Nausea, metallic taste, abdominal pain; long-term high dose copper deficiency করতে পারে।
• Interaction: Tetracycline ও quinolone antibiotic-এর absorption কমায়; antibiotic dose zinc-এর ২ ঘণ্টা আগে বা ৪–৬ ঘণ্টা পরে নিতে হয়। Penicillamine-এর absorption-ও কমাতে পারে।

---

4. Folic acid

• Drug description: DNA synthesis ও cell division-এ দরকারি B-vitamin; spermatogenesis support-এ adjunct হিসেবে ব্যবহার হয়।
• Tablet 1.Folison 5mg AS A Folic acid AS A Drugs for Megaloblastic Anemia, Vitamin-B preparations.
• Indication: Folate deficiency বা zinc-এর সাথে adjunct।
• Dose: 400 microgram to 1 mg orally daily।
• Duration: 3 months।
• Side effects: Usually safe; high dose vitamin B12 deficiency mask করতে পারে।
• Interaction: Methotrexate, some anticonvulsants, trimethoprim-class drugs-এর সাথে clinically relevant interaction হতে পারে; drug history review জরুরি।

---

5. Vitamin C

• Drug description: Water-soluble antioxidant; seminal oxidative stress কমাতে adjunct।
• Tablet 1.Ceevit 500mg AS A Ascorbic acid AS A Vitamin-C Preparations.
• Indication: Idiopathic infertility adjunct; smoking/oxidative stress suspected।
• Dose: 500 mg orally once or twice daily।
• Duration: 3 months।
• Side effects: Gastric irritation, diarrhea; predisposed patient-এ high dose renal stone risk।
• Interaction: Aluminium-containing antacid-এর aluminium absorption বাড়াতে পারে; iron absorption বাড়াতে পারে।

---

6. Vitamin E

• Drug description: Fat-soluble antioxidant; sperm membrane lipid peroxidation কমাতে theoretically helpful।
• Capsule 1.E-CAP 400 mg AS A Alpha-tocopherol  Acetate AS A Herbal and Nutraceuticals, Vitamin-E Preparations.
• Indication: Oxidative stress suspected idiopathic oligozoospermia; adjunct only।
• Dose: 200–400 IU orally daily।
• Duration: 3 months।
• Side effects: Nausea, loose stool, headache; high dose bleeding risk।
• Interaction: Anticoagulant/antiplatelet drug যেমন warfarin, aspirin, clopidogrel-এর সাথে bleeding risk বাড়তে পারে।

---

C. Hormonal treatment — low testosterone / hypogonadotropic pattern থাকলে

7. Clomiphene citrate

• Drug description: Selective estrogen receptor modulator বা SERM; hypothalamus–pituitary axis-এ negative feedback কমিয়ে endogenous LH/FSH ও testosterone বাড়াতে পারে।
• Tablet 1.Ovuclon 50 mg AS A Clomiphene citrate AS A Drugs for Infertility.
• Indication: Low testosterone with low/normal LH, fertility desired; idiopathic oligozoospermia selected case। Male use অনেক জায়গায় off-label। AUA/ASRM SERMs infertile men-এ ব্যবহারের কথা বললেও idiopathic infertility-তে benefit limited বলে।
• Dose: 25 mg orally every other day; response কম হলে 25 mg daily বা 50 mg every other day specialist supervision-এ।
• Duration: 3–6 months; ৬–৮ সপ্তাহে testosterone/LH/FSH check, ৩ মাসে semen analysis।
• Side effects: Headache, mood change, acne, gynecomastia, visual blurring/spots/flashes, nausea; rare thromboembolism। Visual symptom হলে drug বন্ধ করে ophthalmology evaluation দরকার। DailyMed visual disturbance warning দেয় এবং বলে interaction documented নয়।
• Interaction: Documented major drug interaction নেই, কিন্তু concurrent hormonal drugs/SERM, anticoagulant, anticonvulsant বা liver disease থাকলে specialist review দরকার। Liver disease/history of liver dysfunction থাকলে contraindicated।

---

8. Human chorionic gonadotropin — hCG

• Drug description: LH-like action করে Leydig cell stimulate করে endogenous testosterone বাড়ায়; fertility চাইলে testosterone-এর alternative হিসেবে ব্যবহার করা যায়।
• Injection IM/SC 1.HCG  5000IU/Vial AS A Human chorionic gonadotropin AS A Female Sex hormones.
• Indication: Hypogonadotropic hypogonadism, low testosterone with fertility desire। AUA/ASRM low testosterone infertile men-এ hCG/SERM/AI use consider করতে বলে।
• Dose: 1,500–2,000 IU SC/IM 2–3 times/week; কিছু protocol-এ 500–1,000 IU 3 times/week থেকে শুরু হয় বা 4,000 IU 3 times/week specialist protocol-এ ব্যবহৃত হয়।
• Duration: Minimum 3–6 months; spermatogenesis recovery 6–12 months বা বেশি লাগতে পারে।
• Side effects: Acne, gynecomastia, edema, headache, mood change, injection-site pain, raised estradiol; allergy/urticaria/angioedema rare। DailyMed hCG adverse effects হিসেবে headache, irritability, restlessness, depression, fatigue, edema, gynecomastia ও injection-site pain উল্লেখ করে।
• Interaction/caution: hCG LH assay-এ cross-react করতে পারে; cardiac/renal disease, epilepsy, migraine, asthma-এ fluid retention caution। Prostatic carcinoma/androgen-dependent neoplasm-এ contraindicated।

---

9. FSH analogue / Menotropin

• Generic name: Follitropin alfa, follitropin beta, urofollitropin, menotropins।
• Injection 1.Gonal-F SC Injection75IU/Pre-filled syringe AS A  Follitropin alfa Drugs for Infertility.
• Drug description: Sertoli cell stimulate করে spermatogenesis support করে।
• Indication: Hypogonadotropic hypogonadism; hCG দিয়ে testosterone normalize হওয়ার পর sperm production inadequate থাকলে add করা হয়। AUA/ASRM বলে HH-তে hCG শুরু করে testosterone monitor করা হয়, তারপর FSH/FSH analogue add করা যায়।
• Dose: 75–150 IU SC/IM 2–3 times/week।
• Duration: 3–6 months minimum; অনেক HH case-এ 6–18 months লাগতে পারে।
• Side effects: Injection-site pain, acne, gynecomastia, mood change, testicular discomfort; cost high।
• Interaction: Clinically major interaction কম; সাধারণত hCG-এর সাথে combination protocol-এ দেওয়া হয়। Specialist monitoring ছাড়া ব্যবহার করা উচিত নয়।

---

10. Anastrozole

• Drug description: Aromatase inhibitor; testosterone থেকে estradiol conversion কমায়, ফলে selected men-এ testosterone/estradiol ratio improve হতে পারে।
• Tablet 1.Entroza 1mg  AS A Anastrozole AS A Hormonal Chemotherapy.
• Indication: Obese male, high estradiol, low testosterone-to-estradiol ratio, low testosterone with fertility desire। AUA/ASRM low serum testosterone infertile men-এ aromatase inhibitor consider করতে বলে।
• Dose: 0.5–1 mg orally 2–3 times/week; কিছু study/protocol-এ 1 mg daily ব্যবহার হয়, but close monitoring দরকার।
• Duration: 3 months, তারপর hormone profile + semen analysis; selected case-এ 6 months।
• Side effects: Joint pain, hot flush, low libido if estrogen over-suppressed, mood change, headache, liver enzyme elevation; long-term use-এ bone density কমতে পারে।
• Interaction: Tamoxifen একসাথে দেওয়া উচিত নয়; estrogen-containing products anastrozole-এর effect কমাতে পারে। DailyMed tamoxifen ও estrogen-containing therapies-এর interaction উল্লেখ করে।

---

D. Hyperprolactinaemia থাকলে

11. Cabergoline

• Drug description: Dopamine D2 receptor agonist; pituitary prolactin secretion কমায়।

Tablet 1.Caberol 0.5mg AS A  Cabergoline AS A Antiparkinson drugs.

•  
• Indication: Prolactin বেশি, low libido/ED/low testosterone/oligozoospermia with hyperprolactinaemia; prolactinoma থাকলে endocrinology care।
• Dose: 0.25 mg orally twice weekly; prolactin অনুযায়ী প্রতি ≥4 সপ্তাহে 0.25 mg twice weekly করে titrate; maximum usually 1 mg twice weekly। FDA label এই starting dose ও titration উল্লেখ করে।
• Duration: Prolactin normalize হওয়া ও cause অনুযায়ী; সাধারণত months to years, endocrinologist follow-up সহ।
• Side effects: Nausea, headache, dizziness, constipation, fatigue, postural hypotension; rare cardiac valvulopathy, impulse-control disorder। FDA label common adverse reactions nausea/headache/dizziness এবং valvular monitoring উল্লেখ করে।
• Interaction: D2 antagonist drugs যেমন metoclopramide, phenothiazines, butyrophenones, thioxanthenes-এর সাথে না দেওয়া ভালো; antihypertensive drug-এর সাথে postural hypotension বাড়তে পারে।

---

E. Infection / STI-related oligospermia হলে

12. Doxycycline

• Drug description: Tetracycline antibiotic; Chlamydia/NGU/epididymitis coverage।
• Capsule 1.Doxibac 100 mg Doxycycline Hydrochloride Tetracycline group of drugs.
• Indication: Nongonococcal urethritis, chlamydia suspected, epididymitis due to STI।
• Dose: 100 mg orally twice daily।
• Duration: NGU/chlamydia urethritis: 7 days; STI epididymitis: 10 days। CDC epididymitis guideline ceftriaxone plus doxycycline 100 mg twice daily for 10 days recommend করে when chlamydia/gonorrhoea likely।
• Side effects: Nausea, gastritis, photosensitivity, esophagitis; adequate water দিয়ে নিতে হবে, শোয়ার ঠিক আগে নয়।
• Interaction: Antacid, calcium, iron, magnesium laxative doxycycline absorption কমায়; MedlinePlus doxycycline 1–2 ঘণ্টা আগে/পরে antacid-calcium এবং iron থেকে আলাদা নিতে বলে।

---

13. Ceftriaxone

• Drug description: Third-generation cephalosporin antibiotic; gonorrhoea coverage।
• Indication: Gonorrhoea suspected urethritis/epididymitis; usually doxycycline-এর সাথে যদি chlamydia excluded না হয়।
• Injection 1.Axon IM 500MG/VIAL AS A Ceftriaxone Sodium AS A Third generation Cephalosporins.
• Dose: 500 mg IM single dose; body weight ≥150 kg হলে 1 g IM single dose। CDC epididymitis guideline এই dosing উল্লেখ করে।
• Duration: Single dose; chlamydia not excluded হলে doxycycline add।
• Side effects: Injection-site pain, rash, diarrhea, allergy/anaphylaxis rare, biliary sludge rare।
• Interaction: Calcium-containing IV solution-এর সাথে mixing/co-administration caution; beta-lactam allergy history থাকলে caution। FDA label ceftriaxone-calcium interaction warning উল্লেখ করে।

---

14. Levofloxacin

• Drug description: Fluoroquinolone antibiotic; enteric organism epididymitis/prostatitis coverage।
• Tablet 1.Levomax 500 mg AS A Levofloxacin Hemihydrate AS A 4-Quinolone preparations.
• Indication: Enteric organism suspected epididymitis, gonorrhoea ruled out হলে।
• Dose: 500 mg orally once daily।
• Duration: 10 days। CDC enteric organism epididymitis-এ levofloxacin 500 mg daily for 10 days recommend করে।
• Side effects: Tendinitis/tendon rupture, QT prolongation, dysglycaemia, insomnia, dizziness, neuropathy; elderly, steroid user, renal disease-এ caution। MedlinePlus levofloxacin-এর tendon rupture warning দেয়।
• Interaction: Antacid with magnesium/aluminium, sucralfate, iron, zinc, multivitamin absorption কমায়; dose কমপক্ষে ২ ঘণ্টা আলাদা রাখতে হয়। Warfarin-এর সাথে INR/bleeding monitoring দরকার।

---

F. Surgical / ART management

• Palpable varicocele + infertility + abnormal semen parameter: microsurgical varicocelectomy consider; imaging-only nonpalpable varicocele হলে surgery recommend নয়। AUA/ASRM এই recommendation দেয়।
• Low total motile sperm count: repeated semen analysis-এ total motile sperm count কম হলে IUI success কমতে পারে; IVF/ICSI consider করা যায়। AUA/ASRM low total motile sperm count repeated SA-তে ART consider করার কথা বলে।
• Severe oligospermia, female age >35, long infertility duration, failed IUI, genetic cause: reproductive medicine referral for IVF/ICSI।

---

Overview / Summary

Oligospermia বা oligozoospermia হলো sperm concentration কম থাকা, সাধারণত <16 million/mL। এটি বেশিরভাগ সময় symptomless; প্রধান সমস্যা infertility। Diagnosis করতে repeat semen analysis, reproductive history, physical examination, hormone profile, infection test, genetic test ও imaging প্রয়োজন হতে পারে। Treatment cause-specific: lifestyle correction, infection treatment, hormonal correction, varicocele repair, selected antioxidant support, এবং severe case-এ ART/IVF/ICSI।

Actionable Plan / Steps

1. WHO-standard lab-এ semen analysis repeat করুন — ২–৭ দিন abstinence, কমপক্ষে ১ মাস gap।
2. Report-এ sperm concentration ছাড়াও total sperm number, motility, morphology, volume, pH, WBC দেখুন।
3. Test করুন: FSH, LH, morning testosterone, prolactin, TSH, HbA1c; indicated হলে estradiol।
4. Severe oligozoospermia <5 million/mL হলে karyotype + Y-chromosome microdeletion consider করুন।
5. Smoking, alcohol, cannabis, anabolic steroid/testosterone বন্ধ করুন।
6. Varicocele clinically palpable হলে urologist referral।
7. Fertility চাইলে testosterone injection/gel/capsule নিজে থেকে শুরু করবেন না।
8. Pharmacological treatment cause অনুযায়ী: infection হলে antibiotic, hormonal defect হলে clomiphene/hCG/FSH/AI/cabergoline, idiopathic হলে selected antioxidant trial ৩ মাস।

Reference List

Textbook

• Harrison’s Principles of Internal Medicine, 21st ed. Male Infertility; Hypogonadism; Reproductive Endocrinology sections.
• Davidson’s Principles and Practice of Medicine, 24th ed. Endocrinology and Reproductive Medicine sections.
• Robbins & Cotran Pathologic Basis of Disease, 10th ed. Male Genital System chapter.
• Guyton and Hall Textbook of Medical Physiology, 14th ed. Male Reproductive Physiology chapter.

Guidelines

• WHO Laboratory Manual for the Examination and Processing of Human Semen, 6th ed., 2021.
• AUA/ASRM. Diagnosis and Treatment of Infertility in Men: Guideline Part I, 2020/2021. DOI: 10.1097/JU.0000000000001521; Fertility & Sterility DOI: 10.1016/j.fertnstert.2020.11.015.
• AUA/ASRM. Diagnosis and Treatment of Infertility in Men: Guideline Part II, 2020/2021. DOI: 10.1097/JU.0000000000001520; Fertility & Sterility DOI: 10.1016/j.fertnstert.2020.11.016.
• CDC Sexually Transmitted Infections Treatment Guidelines, 2021.
• EAU Guidelines on Sexual and Reproductive Health: Male Infertility, 2025.

Peer-reviewed DOI

• Björndahl L, Kirkman-Brown J. The sixth edition of the WHO laboratory manual for the examination and processing of human semen. Fertil Steril. DOI: 10.1016/j.fertnstert.2021.12.012.
• Eisenberg ML, et al. Diagnosis and Treatment of Infertility in Men: AUA/ASRM Guideline Part II. J Urol. DOI: 10.1097/JU.0000000000001520.
• Schlegel PN, et al. Diagnosis and Treatment of Infertility in Men: AUA/ASRM Guideline Part I. J Urol. DOI: 10.1097/JU.0000000000001521.
• Lin J, et al. Optimal treatment for spermatogenesis in male patients with hypogonadotropic hypogonadism. Medicine. DOI: 10.1097/MD.0000000000016616.

Md.Rafiqul Islam Lipu Date:-12-05-2026 Monday Time:-10-50-25 Pm