Control of colony reproductive dynamics is a crucial aspect of eusociality, but research in this field has been scant and focused primarily on Hymenoptera.  Recent studies with the dampwood termite, Zootermopsis angusticollis Hagen, have begun to explore the roles of hormones (Brent C.S. et al. 2005. J. Insect Physiol. 51: 1200-1209) and nestmates interactions (Brent C.S. and Traniello J.F.A. 2001. Physiol. Ent. 26: 239–247; Brent C.S. and Traniello J.F.A. 2001. Insectes Soc. 48: 384–391) in regulating the timing of reproductive maturation, but it is unclear how these two sets of stimuli dynamically interact to control ovarian development.  This study examines the effects of social stimuli on the endocrine mechanisms and ovaries of maturing female primary reproductives. Newly dealate queens were paired with a reproductive male, with another maturing female, or were allowed to mature in isolation.  After 5, 10, 15 and 30 days of maturation, ovarian development, in vitro rates of juvenile hormone (JH) production, and hemolymph ecdysteroid titers were determined.  Significant declines in JH production rates were observed by days 5, 10 and 30, respectively, for females paired with males, left to mature in isolation or paired with a female.  In females nesting with males, ecdysteroid titers increased by day 5 and stayed elevated.  In isolated females or those with another female, titers declined and stayed low until a significant increase by day 30.  These hormonal differences corresponded to differential rates of maturation, with more rapid ovarian development in females paired with a male, than in those nesting alone or with another female.  The results suggest that JH and ecdysteroids modulate the ovarian response of alates to stimuli from nestmates, and that JH and ecdysteroids may be regulated independently during this stage of development.