After the heartbeat is detected the risk of miscarriage begins to decline, but there are different factors that affect the rates of miscarriage. The numbers are not exact, but can give a rough estimate at the rates of pregnancy loss for certain situations: Dorris Wedding simple styled garments of the wedding

No vaginal bleeding. With no vaginal bleeding, the chances of miscarriage after seeing heartbeat are 4%.

I didn't ask to be one of those 1 in 4. Nor did I volunteer to be in the 4% but I am.