A．初潮的遲早與營養(yǎng)及體質(zhì)強(qiáng)弱有關(guān)
B．正常月經(jīng)呈鮮紅色，易凝固
C．月經(jīng)周期是指月經(jīng)干凈到下次月經(jīng)來潮
D．初潮的年齡大多數(shù)在18歲左右
E．決定月經(jīng)周期長短的是黃體期

A．月經(jīng)第一次來潮稱為初潮
B．經(jīng)血不凝是因血中含有抗凝物質(zhì)
C．月經(jīng)血呈堿性
D．月經(jīng)量為30～50ml
E．經(jīng)期長短因人而異但應(yīng)有規(guī)律