In November 1942, the Italian cyclist Fausto Coppi took "seven packets of amphetamine" to beat the world hour record on the track.  In 1960, the Danish rider Knud Enemark Jensen collapsed during the 100 km team time trial at the Olympic Games in Rome and died later in hospital. The autopsy showed he had taken amphetamine and another drug, Ronicol , which dilates the blood vessels. The chairman of the Dutch cycling federation, Piet van Dijk, said of Rome that "dope – whole cartloads – [were] used in such royal quantities." 
I was actually diagnosed as infertile due to a lack of ovulation…. which I decided on my own was wrong. I’m an herbalist, so I’ve spent the past 7 years intensively studying the herbs used for hormonal balance both because I so desperately wanted to have children… and I think ultimately I was meant to share my journey. At any rate, what I found out on my own once away from the doctors was that I had a progesterone deficiency… I suspect this is a hormonal imbalance that can start in the womb, so it might be interesting to take a look at your mom and grandma if you still can. A big tip off for me, besides the short luteal phase was the brown discharge that occurred in my monthly flow. Ironically, I always thought that was normal because my mother had always had it as well. It’s a big sign that your progesterone is not sufficient to fully flush your uterine lining the month before and your womb is just constantly trying to get rid of left over blood each succeeding month. My mom also had a number of miscarriages and I was the only pregnancy to go full term. What’s great about this little symptom is that as I achieved balance, I could very clearly see a different cycle- one that was red from end to end. After a couple years working with the herbs (and a whole foods diet of course) I had my first child… and then I got pregnant by surprise about 18months afterwards! I believe I can see some symptoms of my chronic low levels returning- though my cycle remains red… so I’m going to have to start back into my routine.