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In Sonora, Mexico, extensive cattle production is conducted in 15.4 million hectares, of which 5.5 (36%) are semi-arid areas including grasslands that present production rates with very marked differences which can increase cattle production levels on the rangeland with the application of available technologies. Data from 2006-2014 was collected and analyzed, including the month of birth of calves, monthly precipitation, annual inventories and herd composition and stocking rates from a ranch located in north-central Sonora in the municipality of Cananea with a surface of 707-10-21 ha and the capacity to hold 66 Animal Units. Using descriptive statistics we found that 58.5% (� 7.7) of calving occur in mid-April to July 31. During the period, the average annual precipitation was 454.5 mm, and the data showed that from total, 326.3 mm were grouped in the months of July, August and September, which represents 76.9%. The annual average calving percentage is 70.1% with fluctuations of 32% in 2012 to 97% in 2011. The annual inventory showed a stock of 88 heads of which 44 (49.9% were cows) had an average calving percentage of 70.1% with fluctuations of 32% in 2012 to 97% in 2011. The average stocking rate was 75.58 A.U. and the recommended rate is 66 Animal Units showing an overstock of 9.58 A.U. which represents 14.5%. It's possible the application of reproductive techniques to optimize cattle production in semiarid rangelands. We conclude that it is feasible to implement a breeding season of three months from July to September to coincide with the natural breeding season reported, reduce supplementation costs, and increase the calving rate to 80%, depending on climatic conditions and the management of the rangeland.