·         Postmaturity- Pregnancy is not usually allowed to progress beyond 42 weeks. Accurate dating in early pregnancy is essential.

At postmaturity ultrasound may show:

Oligohydramnios

Skin wrinkling.

 

Growth retardation late in pregnancy may also be associated with

meconium aspiration.

 

·         Prematurity- Delivery prior to term, i.e. before 36—42 weeks.

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