Explanation: An unqualified column name is. ambiguous if more than one table or view identified in. the FROM clause has a column with that name, or if. more than one column of a nested table expression has. that name.
The exact cause of clubfoot is unknown, but doctors agree that a family history of clubfoot increases the likelihood that a child will be born with the condition. In addition, mothers who smoke and drink during pregnancy are more likely to give birth to a child with a clubfoot or clubfeet.
Causes of the Tailbone Pain in Early Pregnancy (First Trimester). During pregnancy, the hormones relaxin and estrogen cause relaxation of the ligaments in the pelvic floor, which allows the coccyx to shift more than usually; this can cause pain.Pregnancy may worsen the tailbone pain caused by pre-existing conditions, such as: 1  Constipation.2  Herniated disc in the lower back â pain may be located in the sacral area or in the left or right buttock and may spread down a leg and possibly causing tingling in the feet.3  Lower back injury, a fall on the tailbone.uring pregnancy, the hormones relaxin and estrogen cause relaxation of the ligaments in the pelvic floor, which allows the coccyx to shift more than usually; this can cause pain. Pregnancy may worsen the tailbone pain caused by pre-existing conditions, such as: