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  • Title: Adding L-carnitine to clomiphene resistant PCOS women improves the quality of ovulation and the pregnancy rate. A randomized clinical trial.
    Author: Ismail AM, Hamed AH, Saso S, Thabet HH.
    Journal: Eur J Obstet Gynecol Reprod Biol; 2014 Sep; 180():148-52. PubMed ID: 25015747.
    Abstract:
    OBJECTIVE: To evaluate the effectiveness of L-carnitine on improving the ovulation and pregnancy rates as well as adverse metabolic indices in clomiphene-resistant PCOS. DESIGN: Single center, double blinded, superiority, randomized controlled clinical trial. SETTING: Women's Health Hospital, Assiut University. METHODS: One hundred and seventy women diagnosed with PCOS were found to be clomiphene resistant. The women were randomly allocated into two groups: Group A (n=85), where patients received 250 mg clomiphene citrate from day three until day seven of the cycle plus L-carnitine (LC) 3g daily; and Group B (n=85) received 250 mg clomiphene citrate with placebo. OUTCOME: Primary outcome is cumulative clinical pregnancy rate. Secondary outcomes are changes in serum glucose level and lipid profile. RESULTS: The combination of L-carnitine and CC significantly improve both the ovulation and the cumulative pregnancy rates in clomiphene resistant PCOS (55 (64.4%) vs. 15 (17.4%) and 44 (51.5) % vs. 5 (5.8) %). The number of stimulated follicles reaching ≥17 mm diameter was significantly more in Group A to Group B (2.2 ± 0.77 vs. 0.16 ± 0.79; p<0.0001). Group A needed significantly fewer days for adequate follicular maturation, had a thicker endometrium and higher oestradiol concentration at the time of human chorionic gonadotrophin injection (10.1 ± 0.1mm vs. 6.8 ± 0.4mm; p<0.0001). The same group had a higher mean luteal-phase serum progesterone compared with the control group (13.55 ± 0.99 vs. 10.6 ± 0.98 ng; p<0.0001). A significant difference was found regarding the clinical pregnancy rates (42 (49.4%) vs. (1) 1.1% respectively p value <0.0001). CONCLUSION: Adding L-carnitine when treating clomiphene-resistant PCOS patients not only improved the quality of ovulation and the pregnancy rate with an acceptable patient tolerability, but also enhanced the patient lipid profile and body mass index.
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