If a pregnant female contracts the distemper virus, her puppies may be spontaneously aborted, especially if they're still tiny embryos. (dogcare.dailypuppy.com)
However, most atheist's I know are very happy with their lot in life, and feel «this» is more than enough, more than we ever asked for or could have dreamed of as a tiny embryo. (religion.blogs.cnn.com)
As prominent abortion advocate Garrett Hardin puts it, «Why should we call a fertilized egg or a tiny embryo a human being?» (firstthings.com)