Obstetrics review on first pregnancy

[Lala9]

Hello

I have just received a letter from the hospital saying that an appointment has been for me to see the Obstetrics to review my obstetric and/or medical history.
I had no idea about this appointment being requested so I called ante-natal but they did not give me any further info than 'this may had been requested because something of concerned was spotted, or because it's your first pregnancy'. The appointment is only in a month's time and they left me very concerned!!
Is this visit to the Obs fairly normal for first time pregnancies?
Thanks