Most scans are carried out by specially trained staff called sonographers.
The procedure is carried out in a dimly lit room so the sonographer is able to get good images of your baby. You will then be asked to lower your skirt or trousers to your hips and raise your top to your chest.
On average only 5% of births take place exactly on the estimated due date.
We plowed through some of Swift's biggest hits and matched the lyrics to 10 of Swift's high-profile (reported) former relationships.
It's all based on clues, speculation and a few rumors, so there's no guarantee we got 'em all right. (December 2012-January 2013) Taylor's rocky, brief relationship with One Direction's Harry Styles was scrutinized by the media from the day the pair stepped out together.
Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle).
Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy.
Country pop darling Taylor Swift has certainly become known for writing songs about the ghosts of boyfriends past.