Prenatal Care - Prenatal Examinations

Prenatal Examinations

Prenatal diagnosis or prenatal screening (note that "Prenatal Diagnosis" and "Prenatal Screening" refer to two different types of tests) is testing for diseases or conditions in a fetus or embryo before it is born. Obstetricians and midwives have the ability to monitor mother's health and prenatal development during pregnancy through series of regular check-ups .

Physical examinations generally consist of:

• Collection of (mother's) medical history
• Checking (mother's) blood pressure
• (Mother's) height and weight
• Pelvic exam
• Doppler fetal heart rate monitoring
• (Mother's) blood and urine tests
• Discussion with caregiver

Ultrasound Obstetric ultrasounds are most commonly performed during the second trimester at approximately week 20. Ultrasounds are considered relatively safe and have been used for over 35 years for monitoring pregnancy. Among other things, ultrasounds are used to:

• Diagnose pregnancy (uncommon)
• Check for multiple fetuses
• Assess possible risks to the mother (e.g., miscarriage, blighted ovum, ectopic pregnancy, or a molar pregnancy condition)
• Check for fetal malformation (e.g., club foot, spina bifida, cleft palate, clenched fists)
• Determine if an intrauterine growth retardation condition exists
• Note the development of fetal body parts (e.g., heart, brain, liver, stomach, skull, other bones)
• Check the amniotic fluid and umbilical cord for possible problems
• Determine due date (based on measurements and relative developmental progress)

Generally an ultrasound is ordered whenever an abnormality is suspected or along a schedule similar to the following:

• 7 weeks — confirm pregnancy, ensure that it's neither molar or ectopic, determine due date
• 13–14 weeks (some areas) — evaluate the possibility of Down Syndrome
• 18–20 weeks — see the expanded list above
• 34 weeks (some areas) — evaluate size, verify placental position