1. Absence of corpus luteum rescue by chorionic gonadotropin in women immunized with a contraceptive vaccine 
Rahul Pal, Ph.D., Om Singh, Ph.D. 
Fertility and Sterility 
Volume 76, Issue 2, Pages (August 2001)
DOI: /S (01)

2. Figure 1
Serum progesterone and urinary hCG concentrations in three nonimmunized (control) women who received increasing doses of hCG beginning day 9 after the LH peak. • = progesterone; ○ = hCG.
Pal. Absence of corpus luteum rescue by hCG vaccination. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )

3. Figure 2
Serum progesterone and urinary hCG concentrations in three immunized women who received increasing doses of hCG beginning day 9 after the LH peak. The hCG neutralization capacity of sera (ng/mL): (A) 6, (B) 5, (C) 1. • = progesterone; ○ = hCG.
Pal. Absence of corpus luteum rescue by hCG vaccination. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )

4. Figure 3
Serum progesterone and urinary hCG concentrations in three immunized women who received increasing doses of hCG beginning on day 9 after the LH peak. The hCG neutralization capacity of sera (ng/mL): (A) 50, (B) 40, (C) 100. • = progesterone; ○ = hCG.
Pal. Absence of corpus luteum rescue by hCG vaccination. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )