In the beginning I had to have monthly ultrasounds with my OBGYN. She couldn't find the heartbeat, due to an anterior placenta, with the Doppler.  Because of blood clots early on in my pregnancy, I was placed on blood thinners and sent to see a perinatologist, monthly.  I have ultrasounds monthly with the perinatologist, to check our daughter's growth.  Her umbilical cord doesn't go directly into my placenta, but enters my uterus first.  This is my collection of ultrasound progression thus far.  I'm 33wks tomorrow.