In the early embryo abortion.There are 60-80% is caused due to chromosomal abnormalities, abortion, about 33% of couples in the existence of chromosomal abnormalities.The results of chromosome examination, common are as follows:
First, a balanced chromosomal translocation.Doctors to people is divided into 23 pairs of chromosomes 1-22 and XX or XY.Cytogenetic examination in different size, shape, structure and function of the chromosomal translocation known as the balanced translocation.Balanced translocation, I do not generally occur in patients with deformities and mental retardation, but the carriers can be a normal child birth can also be carriers of balanced translocation reproductive, teratogenic or stillborn children, the probability of each 1 / 4, but random, the latter two cases often lead to abortion.
Shall pay attention to is that at least half of these abortions are caused by her husband.Half of the chromosomes as the fetus from the mother and half from the father.Therefore, abortion wife, the husband must also be done to check the chromosome.Generally do not advocate this type of abortion Baotai.Until 16-20 weeks of pregnancy, amniotic fluid of pregnant women do chromosome examination, if found to be induction of fetal abnormalities, or mental retardation will be birth of deformed children.
Second, homologous chromosome translocation.In short, homologous translocation is No. 2 with translocation between chromosomes.This translocation is formed so that after fertilization the embryo is abnormal fetuses 100%.Because more than one chromosome of the fetus can be born with the deformity is a serious abuse of dementia: a few of the fetal chromosomes, with the exception of monomer X, the whole is still births, therefore, homologous chromosome translocation in patients with not only the choice of birth in order to avoid the suffering of life.
Third, the normal chromosome.For normal chromosome requires further examination of the inspection done.It should be noted that, although husband and wife both normal chromosomes, but the fetus is also the possibility of chromosomal abnormalities occurred as many as a result of chromosomal abnormalities caused by mutations in the early embryo.Therefore, the amniotic fluid of pregnant women in the chromosome examination done before, do not blindly Baotai to avoid low-quality child birth.
