Whether a man is still fertile at age 70 should depend on the actual situation. 70-year-old men who are able to have normal sex and have normal sperm are generally fertile. If there is a loss of sexual function or the presence of azoospermia or oligospermia, he will not be fertile. Under normal circumstances, if a 70-year-old man is in relatively good health, has no serious underlying disease, and has normal sexual performance and normal spermatozoa in his semen, he is generally capable of normal fertility. However, if a man at the age of 70 has some serious diseases, such as cerebrovascular lesions, etc., which may lead to the loss of sexual function, unable to carry out sexual life and fertility, or the semen has too little sperm or no sperm, 70 years old men may lose fertility. To summarize, men at 70 years old generally still have the ability to have children, specific should ask the doctor.