bach, in terms of what we are considering here, the womb has two functions:

1. as a grower of the foetus.
2. as the optimum enviroment for a foetus.

obviously the two functions are inextricably linked, but for the purpose of this topic consider the functions of the womb in a mother who smokes.

first consider function number 2, the environment for the foetus is impaired, and this alone could lead to problems if the foetus has contracted psora in utero - as the combination of the adverse environment [poisoning?] and psora, might cause the poisoning effects to engraft themselves upon the organism leading to disease.
in terms of function number 1, as a grower of the foetus, the womb might* also be impaired, leading to faulty genetic info. but faulty genetic info doesn't always lead to the expression of disease.

in practice who can tell which theoretical situation is going on?