Can taking weight loss pills have an affect on pregnancy? Mom took them in 70s

It can. Dehydration from weight loss pills or worse, scant amniotic fluid both have an effect on developing pregnancies when used. Potassium losing diuretics are the most common form of weight loss pill..
Very likely! Diet pills during pregnancy is not needed and can be harmful to the baby .With taking diet pills before pregnancy the risk is smaller than if you continued to take diet pills.