Most women who develop breast cancer are
beyond their child-bearing years; however, a significant number of younger
women who develop breast cancer want to preserve their ability to have a child.
For these women, a new technique is available that improves the likelihood of
them remaining fertile. In addition, the therapy may reduce younger women
undergoing premature menopause as a result of the treatment. The results were
presented on June 30 at the annual meeting of the American Society of Clinical
Oncology, which runs from May 30 through June 3 in Chicago, Illinois.
Chemotherapy Often Results in Premature Ovarian Failure, Or Early Menopause |
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It is believed that chemotherapy often
results in premature ovarian failure, or early menopause, because active
ovaries are more susceptible to damage from the treatment. Thus, the
researchers thought that forcing them into dormancy and stopping menstruation
might prevent the ovaries from damage. The study group comprised 257 women
under age 50 with breast cancers whose growth was not increased by estrogen.
All the women underwent standard chemotherapy; half also received a monthly
injection of goserelin, which is a drug that lowers estrogen levels and forces
the ovaries into dormancy. The major symptoms of the drug are menopausal
symptoms such as hot flashes and vaginal dryness.
Two years after the onset of the study, complete results
were available on 135 women. Only 8% of those given the goserelin injections
became menopausal, compared to 22% of the women who did not receive the
injections. In addition, among the women in the goserelin group, 22
achieved a pregnancy, compared to 12 pregnancies in the non-goserelin group.
The study authors note that the results are encouraging; however, firm
comparisons cannot be made because not all women may have been trying to
conceive; furthermore, other factors such as a partner's fertility could have played
a role.
Another positive finding of the study was that survival was higher among
women given goserelin. At four years after treatment, 92% of the women who
received goserelin were alive, compared to 82% of the women in the
non-goserelin group. The authors cautioned that the size of the study group was
too small to determine whether ovarian suppression increased survival.
Preserving Fertility During Cancer Treatments |
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