One of the major sources dealing with contraception is [jwa_encyclopedia_glossary:426]Tosefta[/jwa_encyclopedia_glossary] [jwa_encyclopedia_glossary:373]Niddah[/jwa_encyclopedia_glossary] 2:6: “[T]hree women use a [jwa_encyclopedia_glossary:364]mokh[/jwa_encyclopedia_glossary] (contraceptive absorbent): a minor, a pregnant woman and a nursing woman. The minor lest she become pregnant and die ... the pregnant woman lest she make her fetus into a compressed fetus [by conceiving a second time causing the second, later conceived, fetus to crush the first, earlier conceived], a nursing woman lest she kill her child [inadvertently by early weaning as a result of the new pregnancy and not being circumspect in providing alternative healthy food] ….” In the continuation of this [jwa_encyclopedia_glossary:300]baraita[/jwa_encyclopedia_glossary] R. Meir recommends coitus interruptus, an opinion rejected by the sages. The minor was defined as a girl from eleven years and a day to twelve years and a day. Although we now define sexual relations with a minor as child abuse and generally non-procreative, early adolescent pregnancies have the highest mortality rate for both mother and child. In antiquity when cesarean birth, hemorrhage control and antibiotics for infection were unavailable, the mortality rate was extremely high. Superfetation (conceiving again while pregnant) is quite rare but the dangers of a multiple pregnancy both for the mother and the infants are significant. The poskim differ as to whether this baraita should be interpreted as “[S]uch women must use contraception,” in which case other women may also use contraception, or “[S]uch women may use contraception,” thus limiting contraception to those women. The kos shel ikkarin (cup of roots) or sama de-akarta (a drug of sterility or a drug which uproots) referred to in BT Yevamot 65b, etc. is generally considered an oral contraceptive (Riddle).