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.
Tailbone Pain During and After Pregnancy. During pregnancy, the high levels of hormones causes the sacrococcygeal joint to become more flexible. This is necessary for childbirth. However, the coccyx serves as an important site for the attachment of certain ligaments and muscles via tendons.