I had a booking in appt at about 10 weeks, where I just sat down with midwife and we went through my medical history. It took about 2 hours as she had to ask lots of questions.
My first proper appt at the antenatal clinic was when I was 20 weeks, and it took about 5 minutes. All the midwife did was take my blood pressure, feel my tummy and measure fundal height.. and ask how I was feeling and if I had any questions. She also reconfirmed that everything from my ultrasound a couple weeks earlier was fine.