Chou Collection, Lower Volume
Radical: Woman (nǚ)
Entry: ren
Kangxi Stroke Count: 9
Page 259, Entry 17
According to the Correct Character Guide (Zhengzitong), this is the same as the character for pregnancy (ren).
In the Records of Empress Fu in the History of the Later Han (Hou Hanshu), it is used because the noble lady was pregnant.
It is also written as the character for duty (ren).
In the Biography of Lady Zhao Jieyu in the History of the Former Han (Qian Hanshu), she was pregnant for fourteen months before giving birth.