A study published in the November 15, 2003, issue of the American Journal of Epidemiology found that women who used hot tubs or Jacuzzis in early pregnancy were twice as likely to have a miscarriage as women who did not.

Women in early pregnancy -- and those who are trying to get pregnant -- might want to play it safe for the first few months and avoid hot tubs or any exposure to hot water that will significantly increase body temperature.