Your first midwife appointment (also called the booking appointment) should happen around 10-12 weeks pregnant.The appointment usually takes around an hour.
You will be offered a blood test at this time to screen for infectious diseases and sickle cell/Thalassaemia. You can read more about the screening tests on offer here:
Screening tests for you and your baby (STFYAYB) - GOV.UK (www.gov.uk)