Which of the following events is not associated with ovulation in human female?

LH surge is mainly observed during ovulation and helps to develop the corpus luteum. It is produced by gonadotropic cells in the anterior pituitary gland. Estradiol helps in the development of secondary sexual characters and helps in supporting the lining of the vagina, the cervical glands, the endometrium, and the lining of the fallopian tubes. It enhances the growth of the myometrium. Its concentration does not decline during ovulation. Secondary oocytes are released during ovulation. So, the correct answer is option B.