REPRODUCTIVE POTENTIAL OF THE MALE RAT: ENHANCEMENT OF COPULATORY LEVELS FOLLOWING LESIONS OF THE MAMMILLARY BODY IN SEXUALLY NON-ACTIVE AND ACTIVE ANIMALS

Abstract

Ovulation rate in gilts maintained under continuous light (daylight plus 118 to 130 lux of artificial light at night) for a complete oestrous cycle during the spring months was not significantly different from that in gilts maintained under normal daylight. Average ovulation rates were 13·4 for controls and 13·1 for treated gilts. A significant (P<0·01) difference in ovulation rate was found between years.