怀上孩子／双胞胎（等等）
to be pregnant
I hear his wife's having a baby. 我听说他妻子怀孕了。
She was delighted to discover that she was having a baby.
When they got married, everyone assumed she was having a baby.
The technician asked if I knew I was having twins.
When she found out she was having triplets, she didn't know whether to laugh or cry.
See also: have verb (BABY)