Reversing age-related fertility decline in male fruit flies: The crucial role of seminal fluid

As males age, their reproductive success typically declines. A study on fruit flies, led by University of Oxford researchers, has found that while old males do produce fewer offspring than young males, this is not because they have fewer sperm, but it is due to seminal fluid limitation. This study highlights the importance of the seminal fluid in reproductive success and may have crucial implications for improving animal fertility and IVF.