This book discuss the destination of exceeding embryos in the countries institutors members of MERCOSUL, according to the constitutions, civil and criminal codes, and specific rules and conventions that deal with this intriguing thematic, in the national and international scope. The union of effords is positive, between the countries institutors members of MERCOSUL, for the ethical, scientific and legal solution of the subject, since the similitude of the social reality, aiming at the optimization and the development of the techniques, without losing the focus of the human rights.