Even this small sample is some indication of how common miscarriages are. I can add my two penn'orth of having miscarried three times myself. My mother miscarried too sometime in the late 1940s. I rather suspect another might have happened a little earlier as well, but testing was less reliable in those days. It is a devastating and distressing event; emotions might also be much nearer the surface because of hormones clocking in and clocking out so rapidly. It is desperately sad to lose that glorious promise and does stay with you all your life, although the pain of the loss does decrease.
I think it is very hard for fathers to understand. Although they may be looking forward to being a dad, the sheer physical connection is not, of course, there for them. Equally, they fail to understand how a woman can feel that she is somehow to blame even when she knows that she has done nothing that could possibly harm the baby. I'm sure that must be quite irritating, but would advise dads to button their lips over that one, apart from repeating "Of course you did nothing wrong".