In principle, birth prevention is permitted, provided that the few is invested in s ner or later satisfying the mitzvah become fruitful and multiply (which, at least, is comprised of having two children, certainly one of both genders). The problem in birth prevention just isn't whether it's allowed, exactly what method is allowed, and under just what circumstances.
Birth prevention is quite obviously permitted in circumstances where maternity would pose a medical danger to the caretaker or her other kids. As an example, the Talmud recognizes the utilization of birth control by really women that are young expectant mothers or medical women. ...