[Vitamin C determination in urine samples during sex cycle as a way of evaluating the ovulation date].

Concentrations of Vitamin-C in the urine were determined in 35 women, 25 with normal ovulation and 10 with anovulatory cycles, in an attempt to evaluate the day of ovulation. The concentration was determined daily for 8 days after the oral administration of 500 mg of ascorbic acid. Results were confirmed by comparing the urine content of ascorbic acid with concentrations of luteinizing hormone determined in simulataneous serological tests. This method of ovulatory diagnostics proved to be effective and simple.