Twitter has issued a message to reassure its users after the social networking site detected "unusual access patterns" that led to "unauthorized access attempts to Twitter user data".
In a statement on Twitter's blog it said that its investigation had detected that attackers may have had access to usernames, email addresses and passwords for around 250,000 users.
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Facebook, Twitter and Google "are not simply platforms for the content that others post" because they play a role in shaping what users see.
The condition was revealed by a nine-week scan, which showed the baby's heart and part of her stomach growing outside the body.
The scan of the object will begin on Wednesday, with astronomers using four different radio frequency bands. It will last around 10 hours.