It is considered that at least 20% of all the pregnancies finish in
between sixth and the tenth week. Nevertheless, recent studies indicate that the number can be much greater, since many women do not realize of which they are pregnant women, reason why the loss of the product happens inadvertent, since the woman considers that its
is more abundant of the
not that is pregnant.
Most of the
abortions they are caused by some
in the fetal
, generated generally by abnormalitys in some chromosomes or anatomical malformations of the
or the organs that are developed for
, as it is the placenta.
The chromosomic alterations mainly of chromosomes 13, 18 and 21, are responsible for 2, 5% of infantile mortality, and approximately for
abortions during the first trimester.
The chromosomes, that must be integrated in 23 pairs after
fertilization, sometimes are incompletos, well - known affectation like anuplonidia. When in some chromosome only it is 1 needing its pair, monosomía is called to him and when there is one of more in some of them, as in the case of the
of Down, it is known him like trisomía.
abortions also take place by:
, are to say mutations that affect one or more genes.
the age of the woman, who to greater age increases the risk of
the presence of certain environmental polluting agents as the lead or the radiations.
the tabaquismo in the woman, since the lack of oxigenación adapted of the fetus and the placenta can trigger an
the traumatismos by accident or intrafamiliar violence.
of operation in the feminine reproductive apparatus, mainly in the endometrium, that is the layer of the uterus in which it is implanted and it developed in fetus.
like the rubéola and those of
as it can be eritomatoso Lupus.
to have in the matrix some intrauterine device.
By excess of
fort hits emotional.