1st off ~ this Article is roughly 22 Years old.
And a lot of Clinical Tests back then would Skew the results.
Leaning them towards a Predetermined Outcome.
And since I've lost count of the Friends and Associates that I've known since 1978 that have gotten their Ladies Pregnant while On-Cycle.
I'm going to have to put this into the Same Pile.
This Dr. Wu that is mentioned in the Article, has done so many Repetitive Clinical Trials.
That it boggles the mind, and leads me to believe that he was just in it for the Money.
And Not to further any Scientific Understanding on the subject.............................. JP
P.S.
Go to the bottom of this article, and Note how many different Studies that you see Dr. Wu mentioned.
https://academic.oup.com/jcem/article/89/6/2837/2870329