Most babies move the head-down position in the mother's uterus a
few weeks before birth. But if this doesn't happen, the baby's buttocks, or
buttocks and feet, will be in place to come out first during birth. This
position is called breech presentation, and it occurs in about 1-25 full-term
births.
The causes of breech presentation are
not completely clear. However, breech presentation is more common when
certain other conditions are present:
· The mother has had more than one
pregnancy.
· There is more than one fetus in the
uterus.
· The uterus contains too much or too little
amniotic fluid.
· The uterus is abnormally shaped or has
abnormal growths, such as fibroid.
· Placenta previa has occurred.
There are three main types of breech presentation:
1. Frank breech- The fetus’s buttocks are
directed toward the birth canal and the legs extend straight up in front of the
body, with the feet near the head.
2. Complete breech- The buttocks are down,
with the legs folded at the knees and the feet neat the buttocks.
3. Footling breech-One or both of the fetus’s
feet are pointing down and will come out first.
Although most breech babies are born healthy, they do have higher
risk for certain problems than babies in the normal position. Preterm babies
(those born 3 or more weeks early and weighing less than 5 pounds) are more
likely to be breech. Birth defects are also more common in breech babies and
may account for why they have not turned into the proper position before
delivery Your doctor may advise cesarean birth or may attempt vaginal delivery
after carefully assessing a number of factors, such as the stage of pregnancy,
the size of the baby and the mother’s pelvis, and the type of breech position.
In some cases, the baby’s position can be changed by a method
called external version. This technique consists of manually moving or turning
the baby into the head-down position. It does not involve surgery. The doctor
places his or her hands at certain key points on your lover abdomen. He or she
then gently pushes the baby into the head-down position, as if the baby were
doing a slow-motion somersault. Often a
drug is given to the mother first to relax her uterus, and the turning is done
while the fetus is viewed with ultrasound.
An ultrasound exam done in advance allows the doctor to better
check the condition and position of the baby, the location of the placenta, and
the amount of amniotic fluid in the uterus. Before during, and after external
version, your baby’s heartbeat will be checked closely. If any problems arise,
efforts to turn the baby will be stopped immediately. Most attempts at external
version succeed, but some babies will shift back into a breech presentation. If
that happens, your doctor may try again, but external version tends to be
harder to perform as the time of delivery grows closer. The best time for
trying external version is several weeks before your due date.
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