I'm with Sash. Currently 19 weeks.
I've had the following:
Appointment with GP (requested by me, as I am on medications and needed to check I could still take them)
Pre appointment with midwife at GP surgery. Thisbwas around 6 weeks. Weight, urine, did not take bloods I had to book this separately at my GP surgery a few days later. She ran me through a bit of info about all the appointments coming up and gave me leaflets. After this she booked me in for 12 week scan and a consultant appointment. I'm consultant led due to high BMI. Letters for these appointments came through in the post, all to take place at east Surrey hospital. She also asked GP to prescribe high dose folic acid - 5mg - needed due to high BMI.
Booking in appointment, I think I was about 11 or 12 weeks. Same midwife, but there was a trainee midwife asking all the questions with her support. This was at another health centre, not my GP or hospital. Checked urine, did the carbon monoxide test, went through the system and gave me my green notes and a few more leaflets about the various vaccines and stuff. Had a chat about mental health. She mentioned the green notes are something new they are trialling and have a few problems. She didn't weigh me. Perhaps because I'm consultant led?
I got my blood results back at some point. Had to take them twice because they lost half of them....
12 week scan appointment at east Surrey. Before the scan I was weighed by a midwife there, bit random. After the scan I was supposed to go back to reception to book my 20 week scan but was in such a state of shock and awe I forgot 
They posted me the appointment by letter anyway, I didn't need to ask for it.
Consultant appointment at east Surrey about a week later. This was very fast. Midwife did urine, blood pressure. Didn't get weighed. Doc asked general questions and prescribed aspirin 75mg soluble due to risk of preeclampsia at my BMI. This is standard.
Then followed something a little confusing that I didn't enjoy as I was feeling a bit anxious! The doc asked me to go to 2 different department receptions and book my 3 extra scans needed for the high BMI pathway (growth scans I think), and each one had to be at a specific week, and only on a Wednesday afternoon so I could then return to his reception people and book the consultant appointments straight after the scan. I get it now but he spoke so fast, at the time I was really worried I'd got it wrong!
At 16 weeks I had a midwife checkup. It was very brief but not sure if normal. I was in tears the whole time as I had sprained my back the day before and was in agony. She treated me with such kindness I will never forget. She asked if I wanted to hear heartbeat, checked urine and BP. She went to reception to demand a GP appt for me asap (really hard to get one where I am).
Now I'm waiting for 20 week scan next Friday! After that I have a few things booked like my injection because I have the negative blood, and physio because I have pgp/sciatica. I think I have a date for next midwife check but I was addled at the time so cant remember :)
I do wonder if all my scans are at the hospital because I am on high risk path. The health centre where my booking appointment was is much nearer and does scans so I didn't get why I'm not going there. So I'm getting quite familiar with east Surrey now...
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