Table 1. Incidence of vulva cuticle damage in mated and unmated hermaphrodites.

♂+ Strain	♂ Strain	Fraction unmated ♂+ with physical damage	Fraction mated ♂+ with physical damage	P-value*
N2	DR466	0/8	5/9	0.0824
QG2288	QG2288	3/18	20/20	<0.0001

Fractions represent the number of animals with vulval cuticle damage out of the total number of animals observed. DR461 is a strain with a him-5 mutation in an N2 background. ♂+  =  hermaphrodites, ♂  =  males. *Fisher's Exact Test.