Karen Young Kreeger | Feb 17, 2002 | 7 min read
Editor's Note: This is the fourth article in a series on sex-based differences in the biology of males and females. Future articles in the series will cover sex-based differences in drug metabolism and in life expectancy. Lisa Damiani In the 1970s, medical textbooks noted that lupus patients should not get pregnant because it could kill them, recalls physician Michael Lockshin. "I was challenged by a medical student, who had lupus, to show the data to prove that. But it didn't exist and it was a