Antonyms for the word 'antifertility' essentially refer to words that connote fertility, fecundity, and potency. Words that can be used as antonyms to 'antifertility' include prolific, fertile, fecund, productive, generative, fruitful, reproductive, potent, fruitful, and fructiferous. These antonyms represent the opposite of antifertility, i.e., promoting and enhancing fertility. They are used to denote words or objects that boost reproductive health and aid in the process of procreation. The antonyms can be used in various contexts, such as agriculture, medicine, animal husbandry, and human reproduction. In essence, antonyms for antifertility promote renewal, growth, and the creation of new life.