Once the consent has been signed, can a birth parent change their mind?

Pursuant to Florida law, a birth parent who executes a consent for adoption involving a child six months or younger, does not have a grace period in which to change her mind.  The consent for adoption is permanent and irrevocable from the moment it is signed, and only can be overturned based on fraud or duress; however, in cases where the birth parent is placing a child older than six months, the birth parent has three (3) business days to revoke the consent for any reason.  Once this period passes, the consent only can be overturned based on fraud or duress.