Survival curves for Inha-/-, Inha-/-Lhb+/-, Inha-/-Lhb-/-, and Lhb-/- males (A) and females (B). The increase in survival is significant for double knockout males, and from 17 weeks onward, significant for double knockout females (p<0.05, log-rank test). The following numbers of mice were used: Inha-/-, 15 males and 15 females; Inha-/-Lhb+/-, 19 males and 29 females; Inha-/-Lhb-/-, 23 males and 16 females; Lhb-/-, 20 males and 20 females.