. Author manuscript; available in PMC: 2020 Apr 4.

Published in final edited form as: Psychopharmacology (Berl). 2020 Jan 7;237(4):1209–1221. doi: 10.1007/s00213-019-05450-6

Table 1: Breeding Outcomes.

	Saline	Morphine	p-value
Total # of Sires	40	39	-
Total # of Dams Paired	55	58	-
Litters Produced	49	51	-
Insemination Rate	0.890909091	0.879310345	0.8204
Average Litter Size (mean +/−standard deviation)	12.12 +/− 2.04	11.63 +/− 2.70	0.3045
Sex Ratio (mean +/−standard deviation)	0.5124 +/− 0.1392	0.5127 +/− 0.1390	0.9935