But for some women, the period afterward can be stressful, especially when postpartum depression sets in.
Chrissy Teigen is talking about her struggle with the condition.
The former Sports Illustrated swimsuit cover model and her husband, singer John Legend, welcomed a baby girl last April.
But in an essay for Glamour magazine, Teigen says she has been "unhappy" much of the past year and was diagnosed with postpartum depression in December.
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Teigen says she is taking an antidepressant for depression and anxiety and is also in therapy.
Teigen says she's speaking about her experience because she wants people to know postpartum depression "can happen to anybody."