Question on weekly appts?

Annelise • Mom of 5
Today I have my 3rd bi weekly doctors appointment and I'm 33weeks. The 25th will be my last one and I will be 35weeks an then from that point on I see my midwife weekly for the month April I'm just curious on if anything is going to change. Normally I just go in they check height, weight, urine, measure my belly, and just talk to me. Is there a reason why next month I see them every week and will they do anything more during the appointment ?