The preovulatory stage can be detected through various methods: - [Ultrasound](): A transvaginal ultrasound can visualize the growth of the dominant follicle. - [Hormone Levels](): Blood tests can measure estradiol and LH levels. - [Cervical Mucus](): Changes in cervical mucus, which becomes clear and stretchy, indicate high estrogen levels. - [Basal Body Temperature](): A slight drop in basal body temperature may occur just before the LH surge.
