💊 Letrozole for Fertility – LETROMED Human Labs
Letrozole is a non-steroidal aromatase inhibitor that lowers estrogen levels by blocking the enzyme aromatase.
While approved as a breast cancer treatment in postmenopausal women (PharmaWiki), it is also widely prescribed off-label for fertility treatment – especially in women with ovulation disorders such as PCOS.
⚕️ How Letrozole Helps Fertility
By reducing estrogen levels, letrozole increases the release of FSH (follicle-stimulating hormone), which stimulates ovulation.
This mechanism makes it an alternative to clomiphene for women who do not respond to standard fertility treatments.
📈 Medical Use & Dosage
- Standard medical use: treatment of hormone-sensitive breast cancer in postmenopausal women
- Off-label use: fertility treatment to induce ovulation
- Typical dosage: once daily tablet at the same time, independent of meals (PharmaWiki)
⚠️ Side Effects & Risks
Side effects are mainly due to reduced estrogen levels:
- 🔥 Hot flashes & sweating
- 🦴 Joint pain
- 💤 Fatigue & weakness
- ⬆️ Hypercholesterolemia
- 🚫 Contraindications: pregnancy, breastfeeding, premenopausal women
❌ Misuse Warning
Letrozole is sometimes misused as a doping agent in bodybuilding to reduce estrogen.
Such use is banned in and outside competitions and carries health risks.
❓ FAQ – Letrozole for Fertility
1. How effective is letrozole for fertility?
👉 Clinical studies show that letrozole can induce ovulation and improve pregnancy rates in women with PCOS.
2. Is letrozole safe during pregnancy?
👉 ❌ No. Letrozole must not be taken during pregnancy or breastfeeding.
3. How long is letrozole treatment?
👉 Typically 5 days per cycle under medical supervision.




