Table I.
Experimental groups resulting from cross-fostering.
| Litter prenatal exposure condition | CC | IC | CS | IS | UN |
|---|---|---|---|---|---|
| Cc | CCcc (13/10) | ICcc (13/12) | CScc (14/11) | IScc (14/10) | UNcc (12/10) |
| Ic | CCic (12/10) | ICic (15/12) | CSic (12/10) | ISic (14/11) | Unic (15/11) |
| Cs | CCcs (15/10) | ICcs (14/11) | CScs (13/11) | IScs (13/10) | Uncs (13/10) |
| Is | CCis (13/10) | ICis (13/10) | CSis (14/11) | ISis (16/14) | Unis (12/10) |
| Un | CCun (11/11) | ICun (15/13) | CSun (16/10) | ISun (19/17) | Unun (28/23) |
Note. Capital letters indicate the original or parent dams’ treatment; lower case letters indicate the prenatal exposure condition of first generation dams (FGDs). Group designations are as follows: chronic cocaine (CC), chronic saline (CS), intermittent cocaine (IC), intermittent saline (IS), or no treatment (UN). The total numbers of original dams (ODs) and FGDs for each group are listed in parentheses. Group sizes varied as a result of extra breeding for testing purposes and loss of dams for various reasons during the study. Groups with identical letters CCcc indicate treatment dams groups rearing their own litters (i.e. same dam treatment and prenatal exposure condition for pups).