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 can occur in different forms: spina bifida occulta, meningocele (muh-NING-go-seel) or myelomeningocele (my-uh-lo-muh-NING-go-seel). The severity of spina bifida depends on the type, size, location and complications. Spina bifida occulta Occulta means hidden. The mildest form, spina bifida occulta results in a small separation or gap in one or more of the bones of the spine (vertebrae).