「空心胎」

(pos:名詞)
<explanation>
yue:又叫無胚胎懷孕，係#流產 嘅一種；特徵係有#胎囊 但係#胚胎 冇發育或者好早已經停止發育（量詞：個）
eng:blighted ovum; empty sac; anembryonic gestation / pregnancy
<eg>
yue:我試過大肚六週嗰時#流啡，去照先至知係空心胎。 (ngo5 si3 gwo3 daai6 tou5 luk6 zau1 go2 si2 lau4 fe1, heoi3 ziu3 sin1 zi3 zi1 hai6 hung1 sam1 toi1)
eng:I had vaginal spotting at six weeks of gestation, then it was confirmed to be a blighted ovum on ultrasound.