A decline in fertility also means that first births, which are riskier, will increase as a proportion of all births. This means that increasing contraceptive prevalence could, in theory, actually lead to an increase in the maternal mortality ratio, even though the maternal mortality rate and lifetime risk of maternal mortality decline.
Kutsika kwa kubereka kumatanthauzanso kuti kubadwa koyamba, komwe kumakhala koopsa, kumawonjezeka monga gawo la obadwa onse. Izi zikutanthauza kuti kuchulukitsidwa kwa kufalikira kwa njira zakulera kungapangitse kuti chiwerengero cha imfa za amayi oyembekezera chiwonjezeke, ngakhale kuti chiwerengero cha imfa za amayi oyembekezera komanso chiopsezo cha imfa ya amayi oyembekezera chikuchepa