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Female Infertility
Every year, more and more women previously believed to be
'infertile' are giving birth to healthy babies. Infertility
treatments are becoming better all the time, providing women and
couples with opportunities to procreate that they never had in the
past.
Infertility is a term used to describe
the inability to conceive a child within a one year time period.
Infertility is not the same thing as sterility. If a person is
sterile, they cannot conceive. If a woman is infertile, the ability
to conceive is present; however pregnancy is prevented from
occurring for many possible reasons.
There are a number of potential causes of both female and male
infertility. Statistics suggest that approximately 15% of couples
are infertile. Of the 15% of infertile couples, male infertility
accounts for about 20% of the cases. Female infertility accounts for
up to 70% of the cases. This is primarily the result of the
complicated processes involved in the female reproductive system. |
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The majority of infertile women are
not aware that they have a problem until they try to become pregnant.
Irregular menstrual periods and conditions that cause painful intercourse or
menstruation may be the only clues that a problem may be encountered in the
future.
Female Infertility Causes
There are many causes of female infertility that include the woman, the man,
or both. Some causes of infertility are more of a sexual nature, for
example, an inability to get or maintain an erection. Some infections and
diseases can also cause infertility.
The most common causes of female infertility are outlined below.
Endometriosis
Endometriosis is responsible for 5 to 30% of the cases of female
infertility. Endometriosis is a condition where the tissue of the uterine
lining is implanted and growing outside of the uterus. It typically grows on
the ovaries or on the lining of the abdomen near the uterus, fallopian tubes
and ovaries. The result is inflammation and scarring of the tissues of the
pelvis.
Tubal Occlusion
Tubal occlusion is the most common cause of female infertility. It is caused
by an obstructed fallopian tube which makes it difficult for the fertilized
egg to move through the fallopian tube in order to implant in the uterus.
Tubal occlusion is frequently caused by pelvic inflammatory disease (PID).
The majority of women with pelvic inflammatory disease are unaware that they
have it.
Polycystic Ovary Syndrome (PCOS)
Polycystic ovary syndrome is responsible for under 10% of cases of female
infertility. PCOS causes high quantities of androgens (male hormones),
especially testosterone, to be produced. This increased androgen production
prevents the ovaries from producing a mature egg. The inability to produce
an mature egg results in the swelling of the follicles of the ovary with
fluid which eventually forms into cysts. PCOS may be the cause of a number
of problems that result in menstrual disorders, including amenorrhea (lack
of menstruation), and oligomenorrhea (infrequent menses).
Hypothalamic-Pituitary Disorders
Up to 30% of cases of female infertility are due to ovulation disorders. The
hypothalamic-pituitary axis is the area of the brain responsible for
ovulation. Disruption of the hypothalamic-pituitary axis can result in
deficiencies in both follicle-stimulating hormone and luteinizing hormone.
Elevated Prolactin Levels (Hyperprolactinemia)
The hormone prolactin acts to stimulate the production of breast milk.
Elevated levels of prolactin in non nursing or non pregnant can affect
ovulation. Some medications can elevate levels of prolactin.
Early Menopause
Early menopause describes premature ovarian failure. Menopause causes the
cessation of menstruation and the depletion of ovarian follicles. When this
occurs before the age of 40, the condition is called early menopause. Many
conditions are linked with early menopause. These include; low levels of
certain growth factors that are produced by the ovaries, radiation therapy,
chemotherapy, and autoimmune disease (where antibodies that attack the
ovary).
Luteal Phase Defect
Luteal phase defect is caused by the interferences in the development of the
lining of the uterus when preparing for the implantation of a
fertilized egg. This is the result of insufficient production of the hormone
progesterone.
Benign Uterine Fibroids
Benign tumors can develop in the walls of the uterus, interfering with the
shape of the uterine cavity. This causes a blockage of the fallopian tubes
or changes in the position of the cervix. The result is that sperm cannot
reach the uterus and fertilize an egg. Benign uterine fibroids are
especially common in women aged 30 to 40.
Pelvic Adhesions
Abdominal surgery, pelvic surgery, and infections can cause scar tissue to
develop. This restricts the movement of the ovaries and fallopian tubes,
causing infertility.
Women who believe they may be infertile or have symptoms associated with
infertility should consult their physician. Although infertility can make
conception more difficult, pregnancy is not out of the question is many
cases.
Learn more about
infertility and
assisted reproductive technologies. Find extensive research and
information from the
infertility
resources web site.
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