How the fertility of currently undocumented migrants might be affected by amnesty was examined within the context of Economic Theory of Fertility. Data were collected in 1980-81 from a sample of births recorded in Los Angeles County in which the mother or father was reported to be of Mexican descent. Multiple regression analyses for male and female legal and illegal long-term U.S. resident migrants showed that legal status independently affected the wage of workers. A log-linear analysis determined the effects of wages and legal status on current fertility of married migrant women living in the United States for at least 3 years. Male wage had a positive, and female wage a negative effect on fertility. However, neither effect was statistically significant. A dichotomous variable representing the couples' legal status had a somewhat strong, but insignificant negative effect on fertility. The removal of both indirect and direct effects of legal status did not cause a significant loss in explanatory power in the model. Variables which did have a significant effect on fertility were mother's age, educational attainment, length of stay in the United States, and a dummy variable measuring whether or not she attended school in the United States. (Author/NQA)