<unk>  duct<unk>  are those structural<unk>  caused by errors in<unk> -duct development during embryonic morphogenesis. Factors that precipitate include genetics, and maternal exposure to teratogens. Genetic causes of<unk>  duct<unk>  are complicated and uncommon. Inheritance patterns can be autosomal dominant, autosomal recessive, and X-linked disorders.<unk>  can be part of a multiple malformation syndrome.<unk>  occur as a congenital malformation of the<unk>  ducts during embryogenesis. The<unk>  ducts are also referred to as paramesonephric ducts, referring to ducts next to (para) the mesonephric (Wolffian) duct during foetal development. Paramesonephric ducts are paired ducts derived from the embryo, and for females develop into the uterus, uterine tubes, cervix and upper two-thirds of the vagina. Embryogenesis of the<unk>  ducts play important roles in ensuring normal development of the female reproductive tract. However, when defects in each of the three phases of embryogenesis occur, it results in specific structural malformations which are distinguished according to anatomy into seven classes based on the American Society for Reproductive Medicine (ASRM) classification system. Class I and II<unk>  result from underdevelopment of the two separate primitive uterine, vaginal and cervical pockets due to an arrest of stage one of organogenesis, resulting in underdevelopment of both left and right primitive uterus (class I) or underdevelopment of one of the primitive uterus (class II). Class III and IV<unk>  result from failure of midline fusion of the two separate primitive pockets due to an arrest of stage two of organogenesis. Class V and VI<unk>  result from failure of degeneration of the midline due to an arrest at stage three of organogenesis. Class VII<unk>  are malformations caused by Diethylstilbestrol (DES).
Mullerian anomalies
Sex chromosome anomalies
Ovarian disease
Lactational amenorrhea
Sexual anomalies
Tubal factor infertility
Blighted ovum
Female infertility