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. Author manuscript; available in PMC: 2021 Sep 20.
Published in final edited form as: Addict Biol. 2019 Jul 2;25(5):e12806. doi: 10.1111/adb.12806

Table 1.

Litter characteristics and distribution across behaviors.

Saline
 Morphine
Total Litters Injected 19 25
Development/USVs 19 25
Affective Behavior 18 20
Sensitization 15 20
Litter Size 6.42 ± 0.41 5.88 ± 0.21
% Male 43.09 ± 5.73 44.54 ± 3.32
% Female 56.91 ± 5.73 55.46 ± 3.32