Ovulation can usually occur within 12-24 hours after leucorrhoea pulling. Leukorrhea pulling is due to the formation of cervical mucus stimulated by estrogen. Estrogen is secreted by the ovaries. As the follicles develop, the level of estrogen secretion increases, and estrogen secretion peaks when the follicles mature, feeding back to the hypothalamic-pituitary center, which secretes gonadotropins and triggers ovulation of mature follicles in the ovaries. The cervical mucus is the external manifestation of the level of estrogen. After menstruation, the follicles in the body are still small, the level of estrogen secretion is low, the female vulva is dry and there is no obvious secretion. It can occur within 12-24 hours after the leucorrhoea is stretched. In some women, it is not easy to capture the stretched leucorrhea, so you can use ovulation test paper to detect it and capture ovulation more easily.