Doctors do not fully
understand the reason why twin pregnancies sometimes occur and also, some
factors can increase the likelihood of giving birth to twins, including:
·
The
woman's age
·
Having
a family history of twins
·
Having
fertility treatments
Conception happens when the sperm fertilizes an egg to form
an embryo. However, if there are two eggs present in the womb at the time of
fertilization or the fertilized egg splits into two separate embryos, a woman can
become pregnant with twins.
There
are two types of twin:
Identical
twins:
This type of pregnancy happens when a
fertilized egg splits into two separated embryos. These embryos are
monozygotic, which means that they have identical genes. Identical twins have
the same sex as each other and look very alike.
Non
identical, or fraternal, twins: This type of pregnancy occurs when
there are two eggs present in the womb at the time of
fertilization, and sperm fertilize both of them. These embryos are dizygotic,
which means that they do not have identical genes and may not be the same sex.
Fraternal twins are common after
fertility treatment because the healthcare professionals often place two
fertilized embryos into a woman's womb to increase the chances of a successful
pregnancy.
Risks
linked with twin births:
Premature birth: Twins who are
born prematurely more than half the time which is a before the end of 36 weeks
of the pregnancy and also Premature babies may have health problems as a
new-borns Sometimes they also have lasting disabilities.
Low birth weight (LBW): is more than
half of twins are born with LBW, weighing less than 5 1/2 pounds. LBW babies
are at increased risk of the health problems after birth, such as
·
Vision
and hearing loss
·
Mental
disabilities
·
Cerebral
palsy
This is more likely if babies are born
before 32 weeks they are weighing less than 3 1/3 pounds.
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