HELLP综合征有三分之一在产后出现？

HELLP syndrome 

Haemolysis, elevated liver enzymes and low platelets comprise the HELLP syndrome. It is usually associated with pre-eclampsia or eclampsia, but these are not a prerequisite for diagnosis. Severe HELLP syndrome has a 5% maternal mortality. HELLP rarely presents before the 20th week of gestation, but one-sixth of cases present before the 3rd trimester and a further third present postnatally (usually within 48h of delivery). Symptoms are sometimes of a vague flu-like illness, which may delay diagnosis. Maintain a high index of suspicion.

HELLP综合征

溶血、肝酶升高和血小板减少构成了HELLP综合征。它通常与子痫前期或子痫相关，但这些并非诊断的必要条件。严重HELLP综合征的孕产妇死亡率为5%。HELLP综合征在妊娠20周前罕见，但也有六分之一的病例在妊娠晚期前出现，另有三分之一在产后出现（通常在分娩后48小时内）。症状有时表现为一种非特异性的的流感样不适，这可能会延误诊断。因此仍需高度警惕。

HELLP综合征有三分之一在产后出现？又那么高的比例吗？不是生完后就开始缓解吗？