Can six week ultrasound cause miscarriage? I did first ultrasound on 08-21-14, (5weeks 6 days), mine is ivf with donor eggs, transferred one blastocyst on 07-30-14, my donor is 29 years old, I am 39 years old, I have a 7 years old daughter , show is my child, not donor. I had twice discharge on 08-22 ( pink spotting one time when I wiped) 08-23 ( brown discharge one time when I wiped), but I have mild cramping , My IVF doctor only saw the sac and the fetal pole, too early to see HB Since I have mild cramping a lot, and some little bit discharge, do you think the first ultrasound may cause miscarriage? My HCG 5000, progesterone is 38. I am on POI shot and estrace pill and minivelle patches until 12 weeks.