Tadalafil has no effect on fertility in general, you can have children normally. Tadalafil is mainly used for the treatment of male erectile dysfunction, can stretch the cavernous smooth muscle, so that the cavernous body of the penis to increase blood flow, so as to improve the hardness of the erection, does not participate in the production and transportation of spermatozoa, generally will not have an impact on the morphology of sperm, can have children normally during the drug. Tadalafil can improve male erectile function, but more conducive to the preparation for pregnancy. Therefore, it is safe to take tadalafil during the preparation for pregnancy, but the use of tadalafil may cause headache, back pain, indigestion and other adverse reactions. It needs to be applied wisely under the guidance of a doctor. Tadalafil is contraindicated in people who are allergic to any of the ingredients in the product, patients who are taking any form of nitrates, guanylate cyclase stimulators, women, children and other people.