While on the surface this seems like a 'girl marries wrong guy' movie, it truly is so much more. The storyline moves a bit too fast, so you must pay attention...very close attention.
After Dianne and Mark find out their baby will be born with genetic disorders, Mark wants to abort the pregnancy; Dianne refuses - Mark takes off. Evidently Mark has unresolved issues about his mother's death in a hospital - but the movie gives very few details or background, so Mark doesn't generate any sympathy from the viewer.
If only he were more like his brother, David (the excellent Campbell Scott) - the soft-spoken, long-suffering doctor who keeps his love for Dianne to himself while helping her to take care of his niece.
The supporting cast is very good, especially Alexa Vega. The ending is a real tear-jerker (get the tissues ready), and my favorite part of the movie.
Some people don't care for these simple movies about triumphing over adversity, but I think it's wonderful - and you will too.