Any male-to-female transgender athlete who went through male puberty won’t be able to compete in top track competitions. The DSD restrictions have major implications for athletes such as Francine Niyonsaba.

For the third year in a row, Caster Semenya was undefeated but was this the last of her dominance?  Domestically, Ajee Wilson was the best of a strong group of US runners. Should US#3 Ce'Aira Brown be ranked in the world's top 10?

Ajee Wilson was masterclass but Francine Niyonsaba looked fantastic as well in her first race of the year. Raevyn Rogers snuck into the final after Wambui was DQd.

Can Ajee Wilson get the elusive gold medal? How does Raevyn Rogers do? Does Niyonsaba stay undefeated lifetime indoors?

Elijah Manangoi headlines the 1500, all of Rio medallists in the women's 800 will clash, and 16-year-old sensation Jakob Ingebrigtsen will race in front of the home fans in the "Dream Mile" which is being set up just for him. *IAAF preview.

There may be a debate about whether Caster Semenya should be allowed to compete, but there was no debate about who the best women's 800 runner was in 2016. American Kate Grace returned from injury with a career year, fulfilling her "dream, dream goal" of making the Olympic final in Rio, but was that enough to crack our world top 10?

Semenya's terrific 2016 campaign continued after she fought off a spirited challenge from the Oregon Track Club's Francine Niyonsaba.

After CAS overturned the IAAF's hyperandrogenism policy last year, Semenya has been unstoppable; the only question in Rio is whether she wants to break the world record. World Indoor medallists Francine Niyonsaba of Burundi and Margaret Wambui of Kenya are the favorites for silver and bronze, though Canada's Melissa Bishop and Kenya's Eunice Sum both have a shot.

Wilson had the lead early, but she wasn't ready for an aggressive move at the halfway point by Niyonsaba, who claimed her first global medal. Kenya's Margaret Wambui was third and the U.S.'s Laura Roesler fourth.

Chanelle Price shocked the world with her gold medal two years ago in Sopot. Can Wilson come through as the favorite on home soil in Portland?

Caster Semenya was a big story in 2011. Dutee Chand is a big story this year, and maybe Margaret Wambui? Some people are under the misconception that these are isolated incidents. They are not. A guest column on the intersex issue facing women's sports, by a former 2:23 men's marathoner who is now a multi-time national champ as a woman.

Wambui upset world #2 Sahily Diago for the win in an 800 that went out faster than last week's Monaco DL meet. Sawe led for most of the race and was simply too good in the end as he was unchallenged in the final straight.
*MB: Letsrun, do we have another 'Caster Semenya situation' in girls 800 at 2014 World Juniors?