Hormones

Chemical hair straighteners may cause uterine cancer — study

The outlook is generally good if the cancer is caught early, but treatment often involves removing the uterus, which would preclude child-bearing.

IAAF ordered to suspend testosterone rules – Semenya lawyers

Double Olympic champion Caster Semenya will be able to run in her favoured 800-metre event without medication to lower her testosterone levels until an appeal to the Swiss Federal Tribunal has been ruled on, her lawyers said.

Is the ‘discriminatory’ ruling against Caster Semenya fair?

The Court of Arbitration for Sport has ruled that South Africa’s Olympic-winning athlete Caster Semenya will have to take pills to suppress the natural levels of testosterone in her body if she wants to continue competing as a female.

Semenya loses appeal against IAAF testosterone rules

The IAAF believes female runners with high testosterone levels have an unfair advantage in events from 400 meters to the mile.

Injectable birth control for men can prevent pregnancy - Study

Researchers have found injecting two different hormones into men every two months suppressed their sperm production enough to function as a birth control.