http://www.snopes.com/politics/sexuality/doping.asp
Claim: Female athletes competing at the Olympics are getting pregnant just so they can abort the baby and by so doing enhance their performance through hormone doping.
Status: Undetermined.
The links you posted provide no definitive answer, simply the notion that this was a conceivable possibility. Any pregnant woman who has ever suffered from morning sickness would immediately dispel such a notion. And any athlete who would sink to such a base idea, does not deserve to win an Olympic medal, much less compete with other national champions. This has to be the most despicable suggestion of how to improve competition, that I have ever heard.