What are the causes for Recurrent miscarriages
The occurrence of two or three pregnancy loses which are clinically recognized and happened before 20th week of pregnancy is called as a recurrent miscarriage. If a woman had one miscarriage then the chances of a healthy baby is 75 percent while a woman had two miscarriages has only 65 to 70 percent chances of having a healthy baby. There can be lot of reasons for having a miscarriage and some of the possibilities for miscarriages are given below.
Causes for Recurrent Miscarriages
The major factors that lead to miscarriage include anatomical, immunological, blood clotting, genetic, hormonal etc.
Some women have a difference in their uterus shape and structure that lowers their chances for having a viable birth. Uterine septum is a major anatomical factor that leads to miscarriages in which there will be a septum with the center that dives the uterus partially or completely in to two. Cervical insufficiency is another anatomical defect in which the cervix will be weak enough to hold the pregnancy. Another anatomical defect includes the presence of fibroids, uterine scarring, intrauterine adhesion etc. All these conditions may cause problems in proper implantation of the embryo with in the uterus and at times also affects the blood supply to the uterus and thus to the baby.
The lack of hormone called progesterone may lead to miscarriages. Similarly thyroid disorders, insulin resistance, elevation in the level of prolactin may also causes miscarriages.
The chromosomes present in the egg or sperm may have abnormalities and the risk of having abnormalities increases after an age of 35 years. If any of the parent have a silent chromosomal abnormality then also the risks for miscarriages increases.
Blood Clotting Disorders
In some cases the clotting of blood may cause miscarriage and this condition is called antiphospholipid syndrome. This is an autoimmune disorder in which the antibodies are produced against the phospholipids. This situation may lead to miscarriages or still birth or even mental retarded new born. Hereditary defects in any of the clotting factors of the blood may leads to blood clots and this condition is called hereditary thrombophilias. This condition also leads to miscarriages.
Infections like bacterial vaginosis may also cause miscarriages.