The movie was awesome, in my opinion.
The miscarriage scene took up a grand total of 13 seconds in a feature-length film, and should not be dwelt upon except to applaud pixar for going against the recent trend in recent years, one bent on hiding children from the truth about life and death.
We all cried when Bambie's mother was killed and cheered when the queen was killed in Sleeping Beauty when we were kids, yet nowadays the villains in Childrens movies just seem to "go away", either to prison or into a plot hole, at the end. God forbid our children should learn the inevitable consequence of life before they are 17.