Alpha x Omega

It is the year 4020, almost all women have gone extinct and the population has plummeted severely due to a sickness that only affected women at the time, it has since been eradicated and girls that are born today are less at risk of the sickness. Scientists have developed a serum, called the Omega Serum. It changes the internal makeup of a male and allows them to conceive children, unfortunately they needed certain genes from a special human called an Alpha. The Omega goes into a cycle called the heat period and during this time, pheromones are released and it attracts any Alpha within a one mile radius and the only thing they think of during this time is breeding.