Missed miscarriage

la

I went to my 9 week ultrasound but baby only measured 4 or 5, so it seems as though my baby stopped growing very early. My doc is checking my hcg levels and repeating the ultrasound to confirm, but it doesn’t look promising (my positive test was 4 weeks ago, so I should at least be 6 weeks).

I’m just wondering for those of you that had a missed miscarriage, did you pass your pregnancy naturally on your own? How long did it take?