▁no ▁emer gent ▁problems , ▁perform ▁serial ▁non - str ess ▁tests ▁and ▁ul tras ound ▁bi oph ys ical ▁profiles ▁and ▁plan ▁delivery , ▁as ▁follows ▁If ▁emer gent ▁problems ▁develop , ▁return ▁to ▁top ▁of ▁decision ▁tree ▁Else ▁if ▁S CT ▁over ▁ 5 – 1 0   cm ▁or ▁poly h yd ram ni os , ▁perform ▁early ▁( 3 7 ▁weeks ▁gest ation ) ▁elect ive ▁Ces are an ▁section ▁Else ▁S CT ▁small ▁and ▁no ▁comp lications , ▁permit ▁term ▁sp ont aneous ▁v ag inal ▁delivery ▁ ▁Emer gent ▁problems ▁include ▁mat ernal ▁mirror ▁synd rome , ▁poly h yd ram ni os , ▁and ▁pre term ▁labor . ▁ ▁Po or ▁management ▁dec isions , ▁including ▁inter vent ions ▁that ▁are ▁either ▁prem ature ▁or ▁delayed , ▁can ▁have ▁dire ▁consequences . ▁ ▁A ▁very ▁small ▁ret ros pective ▁study ▁of ▁ 9 ▁b ab ies ▁with ▁S CT s ▁greater ▁than ▁ 1 0   cm ▁diameter ▁reported ▁slightly ▁higher ▁surv iv or ship ▁in ▁b ab ies ▁remaining ▁in ▁u tero ▁slightly ▁longer . ▁ ▁In ▁many ▁cases , ▁a ▁fet us ▁with ▁a ▁small ▁S CT ▁( under ▁ 5 ▁or ▁ 1 0   cm ) ▁may ▁be ▁delivered ▁v agin ally . ▁Prior ▁to ▁the ▁advent ▁of ▁pr en atal ▁detection ▁and ▁hence ▁scheduled ▁C - section , ▁ 9 0 % ▁of ▁b ab ies ▁diagn osed ▁with ▁S CT ▁were ▁born ▁full ▁term . ▁ ▁Management ▁of ▁adult ▁S