Mais les résultats doivent être attendus longtemps et il n'y a généralement pas de temps doxycycline prix L'autre cas, c'est que l'achat d'un ou d'un autre antibiotique dans une pharmacie classique nécessite des dépenses matérielles considérables et pas toutes les personnes ne peuvent acheter des produits pharmaceutiques aussi coûteux.
AMERICAN SOCIETY FOR REPRODUCTIVE MEDICINE
1209 MontgomeryHighway • Birmingham, Alabama 35216-2809 • T E L (205) 978-5000 • FAX (205) 978-5005 • E-MAIL a s r m @ a s r m . o rg • URL w w w. a s r m . o rg
PATIENT’S FACT SHEET
Cancer and Fertility Preservation
In the United States there are approximately 800,000
little evidence to support suppression of the ovaries
reproductive-aged men and women who have cancer,
before cancer therapy with birth control pills, GnRH
many of whom have concerns about their fertility. Life-
agonists, or other means of hormonal suppression.
saving cancer treatments may reduce fertility by destroy-
Freeze eggs. This technology is investigational,
ing eggs and sperm. The likelihood of reproductive dam-
expensive, invasive, and may delay cancer treatment. If
age depends on the age and sex of the patient and the type
used,eggs are collected as for IVF but are frozen before
and duration of treatment. The most severe damage comes
they are fertilized. Theoretically, frozen eggs may be
from radiation to the ovaries or testicles and cancer drugs
stored, thawed, fertilized, and used for embryo transfer.
in the “alkylating agent” category such as cyclophos-
Actual success with this method is very limited, and few
phamide, mechlorethamine, chlorambucil, and melphalan.
babies have been born with this technique.
Although sperm production may recover, eggs do not
Freeze ovarian tissue. This experimental technique
regenerate; their loss is permanent and premature
requires surgery to remove ovarian tissue. Once frozen,
menopause may occur as a result. The risk of developing
tissue may be stored for years. Preliminary studies have
premature menopause is lower for younger women than
shown that reimplanted ovarian tissue may survive and
for older women. The first goal is to cure the cancer, even
function for a limited time, but no babies have been born
if the treatment causes sterility. However, there are several
options that may help preserve fertility before and after
Fertility after cancer treatment
. It may take up to several years for sperm produc-
tion to recover after cancer treatment. If sperm counts are
Preserving fertility before cancer treatment
consistently low, insemination, IVF, and ICSI may be
Semen samples may be frozen at a sperm bank or
effective measures for achieving pregnancy. Testicular
fertility center before starting chemotherapy or radiation
biopsy may be a way to obtain sperm if sperm are not
therapy. Samples can be stored for years and used later for
found in a semen analysis. If sperm cannot be obtained,
insemination. Sperm counts may be low or absent as a
pregnancy may be possible by using frozen donor sperm.
result of the underlying cancer. If sperm counts are low
The physician may want to wait up to six months before
and/or the supply is limited from the frozen sample, the
attempting conception. Some couples may choose to pur-
sperm can be used for in vitro fertilization (IVF) and intra-
After the physician has advised that attempting
If time and circumstances allow, women may
pregnancy is safe, women may want to consult a fertility
be treated with IVF. Embryos created by IVF are then
specialist to check for damage to reproductive organs.
frozen and may be stored for years. Limiting factors for
Many women will be able to conceive naturally or with
this approach include time, expense, availability of sperm,
fertility treatments. If significant damage has occurred to
and possible delay of cancer therapy. If radiation will be
the ovaries or uterus, couples may wish to consider egg or
administered to the pelvis, the ovaries may be repositioned
embryo donation, a gestational carrier, or adoption to cre-
surgically out of the radiation field. This will reduce the
risk that radiation will damage the eggs.• Areas of research:
Ovarian suppression before cancer therapy. In theory,suppressing ovarian function may protect the eggs against the adverse effects of cancer treatment. There is
The American Society for Reproductive Medicine grants permission to photocopy this fact sheet and distribute it to patients.
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EAZWV Transmissible Disease Fact Sheet Sheet No. 124 STRONGYLOIDOSIS CLINICAL TREATMENT PREVENTION DISEASE ? & CONTROL AFFECTED Fact sheet compiled by Last update Manfred Brack, formerly German Primate Center, Göttingen / Germany. Susceptible animal groups Mainly Old World nonhuman primates, man. Causative organism Strongyloides stercoralis, S.