"抗不育维生素" can be translated as "anti-sterility vitamin" or more specifically, if referring to a particular vitamin known for this property, such as vitamin E (which was once thought to have anti-sterility effects and is sometimes referred to in this context), you could say "vitamin E (the anti-sterility vitamin)".
However, it's worth noting that the term "anti-sterility vitamin" is not a widely recognized or standardized scientific term for all vitamins with anti-sterility properties, as different vitamins may have varying effects on fertility and reproductive health. Vitamin E, for example, was once believed to have anti-sterility effects in males, hence its nickname, but modern research has shown a more complex picture of its role in reproductive health.
In general usage, if you're referring to a vitamin that helps prevent or treat infertility, you might want to specify which vitamin you're talking about (e.g., "vitamin E, which has been studied for its potential effects on fertility") rather than using a broad and potentially misleading term like "anti-sterility vitamin."