This pattern appears the same at the rank of E9 or below. women at the rank of E9 or below (19.7%) and the Marine Corps has the smallest proportion of women enlisted personnel (6.4%). womenâs percentage in officer ranks in the U.S. military services roughly equals their percentage in enlisted ranks.
Spina bifida is a type of birth defect called a neural tube defect. It occurs when the bones of the spine (vertebrae) don't form properly around part of the baby's spinal cord. Spina bifida can be mild or severe.1  The mild form is the most common. 2  It usually doesn't cause problems or need treatment.pina bifida is a type of birth defect called a neural tube defect. It occurs when the bones of the spine (vertebrae) don't form properly around part of the baby's spinal cord. Spina bifida can be mild or severe. 1  The mild form is the most common.
Spina bifida occurs when. the neural tube (area around the spinal cord) does not close during a babyâs development. There are three major types of spina bifida (spina bifida occulta, meningoceles, and. myelomeningoceles).