[lemma=contraceptive] [lemma=□] □
[lemma=contraceptive] [lemma=use] □
[lemma=contraceptive] [lemma=contraceptive] □
[ 15 ] Regardless of whether contraceptive use contributes to most or only half of the decline , contraceptive use is essential to preventing unintended pregnancy . For example , recent surveys in sub-Saharan Africa show convincingly that contraceptive use has lowered fertility from previous levels in Botswana , Kenya , and Zimbabwe . The evidence on the possible effects of the health centers on contraceptive use is similarly mixed . Although it may seem counterintuitive , the rate of abortion has not always declined as contraceptive use has increased around the world .