Estradiol during ovulation is an important hormone that plays an important role in the female reproductive tract. It is the only hormone in the female body that contains estriol, which can promote the maturation and expulsion of female egg cells. It can also promote the contraction of the female uterus and help embryo implantation and development.

During ovulation, a woman's body's estradiol levels peak as the egg matures and prepares to be released. Estradiol can promote the growth and development of egg cells, and can also enhance the stability of egg cells, making them more likely to be attracted to sperm.

In addition to promoting egg cell maturation and expulsion, estradiol can also affect women's uterine contractions and help embryo implantation and development. During ovulation, a woman's uterus will contract to implant the embryo into the uterus, ensuring that the embryo implants in the correct position and avoiding abnormal embryo development.

Estradiol plays an important role in the female reproductive tract. It can promote the maturation and expulsion of female egg cells, and can also affect the contraction of the female uterus to ensure embryo implantation and development. If a woman suffers from irregular menstruation or a reproductive tract disease, medication may be needed to regulate estradiol levels to ensure the woman's reproductive health.