The aim of this study was to evaluate the reproductive response of anovulatory goats exposed to bucks treated with either intramuscular (i.m.) or subcutaneous (s.c.) testosterone in April in northern Mexico (25°LN, 103° LO). Anovulatory female goats (n = 60) were divided in 3 homogeneous groups regarding body weight and condition (20 goats each) and exposed to 2 of 6 multiracial bucks. Males were randomly selected to receive different treatments: (1) 50 mg testosterone i.m. (TIM, n = 2), (2) 50 mg testosterone s.c. (TSC, n = 2) and (3) 0.5 mL of physiological saline (CONT, n = 2). Treatments lasted 21 d, with treatments every 3 d. Thereafter, each group of males was exposed to 20 females to evaluate the male effect. Response variables considered the latency (interval between introduction of the males and estrus initiation) and sexual activity of females twice daily (0700 and 1900 h), for 10 d. The percentages of females in heat, ovulated (10-d post-male introduction) and pregnant (45-d post-treatment) were also considered. Ovulation and pregnancy response were evaluated by transrectal ultrasonographic scanning (7.5 MHz, HS-2000, Honda Electronic CO, LTD). The proportions of females showing estrus, ovulation and pregnancy were compared using an exact Fisher probability test, while latency considered the Student t-test (SYSTAT 5.03 software). Results suggest that males treated with either SC or IM testosterone depicted similar reproductive outcomes, with the TIM depicting the highest estrus response (P < 0.05) yet without differences regarding ovulation and pregnancy rates (Table 1). Table 1. Reproductive outcomes in anovulatory goats exposed to the male effect with mix-breed bucks treated either with s.c or i.m. testosterone during the anovulatory season in northern Mexico (May, 25°N)

Groups	Latency	Estrus %	Ovulation %	Gestation %
CONT	50 ± 3.8ª	65 (14/20)ª	50 (10/20)ª	10 (2/20)ª
TIM	38.4 ± 5.4ª	100 (20/20)b	65 (14/20)ª	55 (12/20)b
TSC	42 ± 3.9ª	65 (14/20)ª	47.5 (9/20)ª	45 (8/20)b

Values with different superscripts within column differ (P < 0.05).