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Inbreeding is the production of offspring from the mating or breeding of individuals or organisms that are closely related genetically. [1] By analogy, the term is used in human reproduction , but more commonly refers to the genetic disorders and other consequences that may arise from expression of deleterious recessive traits resulting from ...
These plates fall off over several weeks. [3] Other complications can include premature birth , infection, problems with body temperature, and dehydration . [ 4 ] [ 5 ] The condition is the most severe form of ichthyosis (except for syndromes that include ichthyosis, for example, Neu–Laxova syndrome ), a group of genetic disorders ...
According to the Centers for Disease Control and Prevention (CDC), most birth defects are believed to be caused by a complex mix of factors including genetics, environment, and behaviors, [13] though many birth defects have no known cause. An example of a birth defect is cleft palate, which occurs during the fourth through seventh weeks of ...
Fetal abnormalities are conditions that affect a fetus or embryo, are able to be diagnosed prenatally, and may be fatal or cause disease after birth. They may include aneuploidies, structural abnormalities, or neoplasms. Acardiac twin; Achondrogenesis; Achondroplasia
Rubella infection in pregnancy can result in various outcomes ranging from asymptomatic infection to congenital defects to miscarriage and fetal death. [3] [4] If infection occurs 0–11 weeks after conception, the infant has a 90% risk of being affected. [1] If the infection occurs 12–20 weeks after conception, the risk is 20%. Infants are ...
A blighted ovum is a pregnancy in which the embryo is reabsorbed or never develops at all. [1] In a normal pregnancy, an embryo would be visible on an ultrasound by six weeks after the woman's last menstrual period. [2] Anembryonic gestation is one of the causes of miscarriage of a pregnancy and accounts for roughly half of first-trimester ...
Birth defects associated with prenatal exposure to alcohol can occur in the first three to eight weeks of pregnancy before a woman even knows that she is pregnant. [13] Diethylstilbestrol (DES) cervix. The cockscomb, collar, and pseudopolyp of cervix. Cockscomb (hoods) are markedly enlarged folds of cervical stroma and epithelium .
Congenital iodine deficiency syndrome (CIDS), also called cretinism, [2] is a medical condition present at birth marked by impaired physical and mental development, due to insufficient thyroid hormone production (hypothyroidism) often caused by insufficient dietary iodine during pregnancy. It is one cause of underactive thyroid function at ...