birth 
英 [bɜːθ]  美 [bɜrθ] 
n. 出生；血统，出身；起源

例句：
It was the birth of his grandchildren which gave him greatest pleasure. 

孙儿辈的出生给他带来了极大的快乐。

She concealed her pregnancy right up to the moment of birth. 

她隐瞒了自己怀孕的事，直到孩子出生。

She weighed 5lb 7oz at birth. 

她出生时重5磅7盎司。

She's due to give birth at any moment. 

她随时可能分娩。

She's just given birth to a baby girl. 

她刚生了个女儿。