Female Liberal MP numbers on the wane

* 12 out of 60 lower house Liberal MPs are women

* At least three are leaving at the election.

* Five are in seats with margins below five per cent.

* A modest swing could halve the numbers at the next election, taking the proportion of women to its lowest level in 25 years.

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Karen Andrews (McPherson) 11.6

Julia Banks (Chisholm, retiring) 1.2

Julie Bishop (Curtin) 20.7

Nicolle Flint (Boothby) 3.5

Sarah Henderson (Corangamite) 3.1

Sussan Ley (Farrer) 20.5

Nola Marino (Forrest) 12.6

Kelly O'Dwyer (Higgins) 10.7

Jane Prentice (Ryan, retiring, candidate is Julian Simmonds) 9

Melissa Price (Durack) 11.1

Ann Sudmalis (Gilmore, retiring) 0.7

Lucy Wicks (Robertson) 1.1

Australian Associated Press