Step-by-step explanation:
There were many experiments that were performed upon mammals in order to support this statement. Experts say that fertility is affected by different reasons. One of them would be -- too much humidity, hot air and hot weather in general. The hotter it is, the harder it is to perform a se*ual activity and make a baby. On the other hand, biologically, it's said that when the environment is hot, it's harder for sp*rm to travel and reach an egg that should be fertilized. The same is for women and their periods.