Premature birth is not hereditary. There are many causes of premature birth, including reasons associated with the pregnant woman herself, such as hypertension and diabetes during pregnancy, as well as concurrent conditions like chronic nephritis and hyperthyroidism, which can lead to premature birth. Additionally, premature birth can be caused by a relaxed cervix, poor uterine development, congenital uterine malformations, and uterine fibroids. Furthermore, trauma to the abdomen during pregnancy, long-distance and prolonged travel, fatigue, and excessive emotional fluctuations can also lead to premature birth. Therefore, these factors related to premature birth are not associated with genetics.