Genetic defects
Couples can be either passed as a generation of chromosomal abnormalities, chromosomal abnormalities in embryos of 50% to 60% with early spontaneous abortion. Chromosomal abnormalities, including:
① The number of exceptions: common trisomy, X monomer, triploid and so on.
② structural abnormalities: mostly chromosome breaks, inversions, deletions and translocations. Even a small number of chromosomal abnormalities in the embryo pregnancy to term, birth deformities occur after or functional defects.
Maternal factors
Systemic disease: risk of systemic infection during pregnancy, high fever can cause uterine contractions leading to abortion. Bacterial toxins and viruses through the placenta into the fetal blood circulation, leading to fetal death, abortion; pregnant women suffering from severe anemia or heart failure, chronic nephritis, or hypertension, may also cause miscarriage.
Genital anomalies: uterine malformations, uterine cancer, can affect embryo implantation and development which led to abortion. Severe cervical laceration, cervical relaxation lead to premature rupture of membranes inside the mouth of the occurrence of late spontaneous abortion.
Endocrine disorders: hypothyroidism, severe diabetes, failed to control, luteal insufficiency, can lead to miscarriage.
Bad habits: excessive smoking, drinking, excessive drinking coffee, heroin and other drugs, can cause miscarriage.
Traumatic stimuli: uterine trauma, excessive anxiety and fear sadness trauma can cause miscarriage. Mental stress may lead to miscarriage.
Immune dysfunction
Pregnancy similar allograft, exist between embryo and maternal immunological complex and special relationship, so that embryos are not excluded. If both mother and child immunization meet, can lead to maternal rejection caused the abortion of the embryo. And abortion-related immune factors paternal histocompatibility antigens (HLA), fetal antigen, blood group antigens (ABO and Rh), lack of blocking antibodies during pregnancy the mother, maternal anti-paternal cytotoxic lymphocyte antibody deficiencies, pregnant women, antiphospholipid antibodies excessive, the presence of such anti-sperm antibodies.
Environmental factors
Arsenic, lead, formaldehyde, benzene, chlorine, butadiene, ethylene oxide and other chemicals too much exposure, can cause miscarriage.
In fact, about 70% of abortions are caused by chromosomal abnormalities, and pregnancy in the future will not be generally similar problems. However, about 4% of women will be three or four consecutive miscarriages, a condition called habitual abortion. In the event of this unfortunate woman in half is curable, doctors can help them find the cause and remedy, even if some women the disease is unknown, but also under the guidance of a doctor well pregnant. Survey showed that in four consecutive miscarriages, 60% of women who eventually have their own children. So, even if you have blow by abortion, do not worries, baby look in on your wave to you, be patient, since he will come.
