怀孕[huái yùn] 基本解释：

新英汉大词典：

怀孕[huái yùn]

- （妇女或雌性哺乳动物怀胎） be [become] pregnant; conceive; be (heavy) with child; be in the family way; be in her time; be with young; be expecting; be great with child; be in an interesting condition; in trouble; be knocked up; be in a delicate condition; conception; gestation; impregnation:

She is 5 months pregnant.她怀孕5个月了。

She is (heavy) with child again.; She has been in the family way again.她又怀孕了。

短语

怀孕期gestation period; period of pregnancy