Given the task definition and input, reply with output. In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Question: Between 24 and 36 hours after the peak of release of the hormone LH occurs, it is triggered:
Options: <0> The menstruation. <1> Maturation of the Graaf follicle. <2> The ovulation <3> Oogenesis <4> The formation of the primordial follicle.
nursery