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Table 2 Reproductive performance in females gestated with (M+) or without (0M) male cotwins. Means (SEM) are provided

From: Gene changes may minimize masculinizing and defeminizing influences of exposure to male cotwins in female callitrichine primates

Reproductive parameter 0M (SEM) M+ (SEM) t
Leontopithecus rosalia N = 61 N = 90  
 Latency to first parturition (days)*a 318 (32.9) 421 (34.6) −2.14*
 Litter size 1.84 (0.06) 1.84 (0.05) 0.06
 Proportion stillborn infants 0.36 (0.05) 0.37 (0.04) 0.87
Callithrix spp. N = 11 N = 12  
 Age at first ovulation (days)b 533 (51.4) 542 (21.7) 0.17
 Latency to first parturition (days) 266 (38.0) 381 (54.3) 2.99
 Litter size 2.41 (0.16) 2.62 (0.25) 0.49
 Proportion stillborn infants 0.24 (0.06) 0.22 (0.09) 0.21
  1. *P < 0.05
  2. a N 0M = 54; N M+ = 84
  3. b N 0M = 6; N M+ = 10