Rat Estrous Cycle?

[Heyburj at war.wyeth.com]

Does anyone have (or know where to get) an impedance meter designed to 
measure vaginal fluid conductance (rat)?  I heard that they exist but am 
having trouble tracking one down.

Thanks in Advance,

John Heyburn
Wyeth-Ayerst Research
Princeton, NJ 08543
heyburj at war.wyeth.com

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