First,
an obstetrician is trained to diagnose "silent" pregnancy-related
conditions that often have no warning signs or early symptoms,
such as diabetes and high blood pressure. The physician can
also detect if the uterus is not growing as expected, due to
a small (or large) baby or an abnormality.
Second,
at each visit, the physician collects additional "clues" so
he or she can better estimate when the actual due date is. Most
people do not know exactly when they got pregnant but the doctor
needs to know. He or she can only act "intelligently", should
a complication arise, if he knows where the patient is in the
pregnancy, i.e., when the baby is actually due.
In
one patient facing premature labor or cervical dilatation, the
doctor may use all modalities to continue the pregnancy, while
in another he might not. It all depends on the due date. Each
visit provides additional developmental milestones to give the
obstetrician more "clues" about the due date.
Of
course, most deliveries are normal and don't require a physician's
expertise, but you never know what will happen in that delivery
room. The obstetrician or nurse midwife is like a "fireman",
waiting to be called in an emergency.
The
bottom line? Your obstetrical record is the single most important
piece of medical documentation you can provide to a treating
physician in an emergency. If you are a PersonalMD.com member,
enter it into your online health file. If you are not, think
about joining! Should a problem arise, your record will be available
anywhere at any time, so your doctor can best help you.