Hi, I havent personally taken it but I found this for you....

Use in pregnancy (Category B3)
The safety and efficacy of quetiapine during human pregnancy have not been established. Therefore, SEROQUEL should only be used during pregnancy if the benefits justify the potential risks.
Effects related to elevated prolactin levels (marginal reduction in male fertility and pseudopregnancy, protracted periods of diestrus, increased precoital interval and reduced pregnancy rate) were seen in rats, although these are not directly relevant to humans because of species differences in hormonal control of reproduction.
Teratogenic effects were not observed following administration of quetiapine at oral doses up to 200 mg/kg in rats (less than the exposure to quetiapine at the maximum recommended clinical dose based on AUC) and 100 mg/kg in rabbits (approximately twice the maximum clinical exposure based on BSA).

Its a good idea if you have a chat to your psychiatrist to see if there are other altenatives. Im pretty sure haloperadol is similar but is safer in pregnancy. Sorry to be scetchy but its been a while since I have practiced so am not up to date with it all. All the best x o