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Ovarian stimulation with the aromatase inhibitor letrozole has been proposed for ovulation induction in order to treat unexplained female infertility. In a multi-center study funded by the National Institute of Child Health and Development, ovarian stimulation with letrozole resulted in a significantly lower frequency of multiple gestation (i.e., twins or triplets) but also a lower frequency ...
Letrozole is an orally active, nonsteroidal, selective aromatase inhibitor and hence an antiestrogen. It prevents aromatase from producing estrogens by competitive, reversible binding to the heme of its cytochrome P450 unit. The action is specific, and letrozole does not reduce production of corticosteroids. [citation needed
Among all aromatase inhibitors, Letrozole is commonly used for improving female fertility. It works by inhibiting aromatase which is an enzyme that catalyses the conversion of androstenedione and testosterone to estrogen by hydroxylation. Hence, Letrozole inhibits the synthesis of estrogen. [18]
Ovulation induction is the stimulation of ovulation by ... (both being selective estrogen-receptor modulators), as well as letrozole (an aromatase inhibitor). ...
Aromatase inhibitors are a common fertility treatment to treat women with PCOS. A meta-analysis analyzing live birth rates for women with PCOS treated with clomiphene compared to letrozole found that letrozole resulted in higher live birth rates. [11] However, ovulation induction remains an off-label indication, which affects use.
A Cochrane review showed that letrozole (an aromatase inhibitor) appears to improve live birth and pregnancy rates as compared to clomiphene citrate. [13] There appeared to be no difference between letrozole and laparoscopic ovarian drilling .
These treatments can include selective estrogen receptor modulators like clomiphene , a derivative of clomiphene called enclomiphene, or aromatase inhibitors like anastrozole (Arimidex®). These ...
Aromatase inhibitors have been used to preserve fertility by stimulate ovulation in premenopausal breast cancer survivors. By inhibiting aromatase in premenopausal women the estrogen levels are reduced temporarily which leads to increased gonadotropin secretion and stimulate ovaries and that causes rise in estrogen levels.