We report the estimated allele frequencies for 13 and 14 microsatellite loci in two populations of Minas Gerais, Brazil as follows: Belo Horizonte (the capital) and Marinhos (an African-derived community). Analysis of the African, Amerindian, and European genetic contributions to both populations, together with historical information, revealed distinct differences between the two populations. Estimates for Belo Horizonte revealed a higher-European (66%) than African (32%) contribution, and a minimal Amerindian contribution. These results are consistent with the peopling of the city mainly by people from the Minas Gerais hinterland, a people highly admixed but with more European ancestry. Estimates for Marinhos confirmed the high-African component of the population. However, a temporal analysis of two datasets-CURRENT (representing the population living in Marinhos today) and ORIGINAL (representing families, who have lived in Marinhos since the onset of the 20th century),-identified a diminishing of the population's African ancestry from 92% in the ORIGINAL group to 67% in the CURRENT group. This change is here interpreted as a consequence of the growing migration into the village of people with more European ancestry and subsequent admixture with the local population.

. The patients were preferentially treated with ovulation induction with gonadotropins. With the addition ofgonadotropin stimulation, the total and term pregnancy rates per cycle were 14% and 1 1%, respectively, includingalletiologicfactors. These rates were improvedoverthe3%and 2.6%ratesreported inour previousstudy inwhichovarianstirnulationwasnotgenerallyused. Inniale factor patients, the term pregnancy rate was 9%, higher than the 4% term pregnancy rate reported in our previous study. In the present series, morphology was the only severely impaired parameter. The term pregnancy rate was 1 1 % for patients with ovulatory dysfunction, 10% for those with cervical factor, and 10.5% for those with unexplained infertility.

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Due to their ease of analysis and high informativity, these new STR multiplexes will be useful for extending current marker sets for forensic and paternity purposes.