The `Country Strong` actress - who has two children, Apple, seven, and Moses, five, with her husband, Coldplay frontman Chris Martin - is against many cosmetic procedures such as Botox because they are "pure vanity", she would consider going under the knife for surgery to restore her chest to its "original condition".
She told Germany`s OK! magazine: "Before I didn`t care about it. And I still refuse to use silicone, Botox or other of those gimmicks out of pure vanity.
"But a breast correction after breast feeding - why not? There`s actually nothing else to restore the original condition, isn`t there?"
The 38-year-old star - who is well-known for adhering to a healthy lifestyle and strict exercise regime - admitted she "lost her waist" and became a "boxy" shape after giving birth.
Gwyneth said: "I somehow lost my waist because of intense yoga training and became almost boxy. But with stretching and Pilates exercises I hit form again.
"I don`t have time to do real yoga sessions that last over 60 minutes. But I meditate each day for at least five minutes."