- Epidemiology
- True Prevalence of post-dates pregnancy: 2-3%
- Pseudoprevalence (misdated pregnancy): 10-14%
- Definition
- Post-Term
- Over 294 days (42 weeks) beyond first day of LMP
- Post-Mature Infant
- Truly post-term by objective criteria
- Signs: Physical Characteristics of a post-dates infant
- Underweight due to loss of subcutaneous fat
- Long and thin in girth
- Skin with patchy areas of Desquamation
- Skin, long nails may be covered with meconium
- Wrinkled hands and feet on ventral surfaces
- Management: Antenatal Monitoring
- Weekly Biophysical Profile
- Amniotic Fluid Index
- Demonstrate single 3 cm vertical fluid pocket
- Lack of pocket associated with fetal asphyxia
- Lack of pocket associated with perinatal mortality
- Fetal heart monitoring
- Biweekly Nonstress Test or
- Weekly Contraction Stress Test
- Management: Induction at 42 weeks
- Induction at 41 weeks no recommended
- No benefit to infant
- Higher risk of labor complications
- References
- Alexander (2000) Obstet Gynecol 96:291
Tuesday, March 18, 2008
3 - post-term pregnancy
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