tāi ér / de / xīn zàng / lǐ / yǒu / yí gè / luǎn yuán kǒng / chū shēng / hòu / bù jiǔ / jiù / huì / guān bì胎儿的心脏里有一个卵圆孔,出生后不久就会关闭。The fetal heart has an oval foramen, which closes soon after birth.