FIGURE 1
PROBABILITY OF MATING IN RELATION TO LEVEL
OF PLASMA PROGESTERONE IN THE FEMALE AT
DIFFERENT STAGES OF SEX SKIN SWELLING

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Vie CONG. INTERN. REPROD. ANIM. INSEM. ARTIF., PARIS, 1968, VOL. II

>11 11-98-6 5-3 2-0| 1-3 4-6 7-9 10-12 >12
Days before peak swelling Days after peak swelling