Webster's New World Medical Dictionary

midwife, certified nurse
A person with an
associate’s, bachelor’s, or master’s degree in nurs-
ing who has also completed specialized training in
midwifery. Abbreviated CNM. In the US, CNMs must
earn certification from the American College of
Nurse Midwives.
midwife, certified professional
A midwife
who has completed a degree in midwifery at a cre-
dentialed educational institution. Abbreviated CPM.
midwife, licensed
A midwife who has been
licensed to practice midwifery by a US state.
midwife assistant
A person who assists a mid-
wife with prenatal care, childbirth education, deliv-
ery, and postnatal care. Also known as labor
assistant.
migraine
Usually, periodic attacks of headaches
on one or both sides of the head that may be accom-
panied by nausea, vomiting, increased sensitivity of
the eyes to light (photophobia), increased sensitiv-
ity to sound (phonophobia), dizziness, blurred
vision, cognitive disturbances, and other symptoms.
Some migraines do not include headache, and
migraines may or may not be preceded by auras.
See also 
migraine aura; migraine headache.
migraine, abdominal
An attack of abdominal
pain that may be preceded by a migraine aura and
accompanied by nausea, vomiting, and cognitive
disturbance.
migraine, classic
A migraine with an aura. Such
migraines account for no more than 20 percent of
migraines. See also 
migraine.
migraine, common
A migraine without an aura.
This is the most frequent type of migraine, account-
ing for about 80 to 85 percent of migraines. See also
migraine.
migraine, ocular
A migraine involving the eyes
that results in distortion of visual images, accompa-
nied or followed by headache. An ocular migraine
usually affects only one eye at a time. Image distor-
tion generally begins in the center of the image and
then moves to one side. Images “gray out” or look
wavy, and sight may be lost temporarily. Also known
as retinal migraine.