[Predicting ovulation by detecting the preovulatory rise of estrogens and LH in the urine].

The preovulatory LH surge induces final maturation of the ovocyte which makes it suitable for in vitro fertilization. The spontaneous LH peak can be detected in blood or in the urine. Whatever the method of determination, the diagnosis of the triggering LH surge can be done only on strict criteria. This work defines these criteria when urinary Higonavis is used: a rise in the plus signs in two successive samples or a positive result in urine diluted fourfold.