Infertilely is a relatively uncommon word, and there are not many synonyms that represent its exact meaning. However, there are a few words that may be considered as alternatives. Sterilely, unproductively, barrenly, and fruitlessly are all synonyms that could replace Infertilely in the right context. Sterilely highlights the inability to produce offspring, whereas fruitlessly implies a lack of result or progress. Unproductively and barrenly both convey a sense of not yielding any results, though there may not necessarily be an expectation of producing offspring. Ultimately, the context of the sentence will dictate the most appropriate synonym for Infertilely.