Fertility Preparation Coenzyme Q10 is effective in improving egg quality, favoring increased ATP energy of the egg and improving pregnancy outcomes. The most important role of coenzyme Q10 in reproduction is that it is beneficial in increasing the ATP energy of the eggs. For women, as they age, oxygen free radicals increase, while the ATP content of the eggs decreases, and these problems can lead to a decrease in egg quality, which can increase the risk of miscarriage. Therefore preparation for pregnancy coenzyme Q10 to improve egg quality is effective. There are also some studies that show that coenzyme Q10 not only improves the ATP energy of the egg, but also facilitates the fertilization of the egg and the development of the embryo, and improves the outcome of pregnancy. In addition to this, women who are planning to get pregnant are also advised to eat right, have a regular routine and exercise properly. Coenzyme Q10 is recommended to be supplemented with the right dosage under the guidance of a doctor.