c - usaid
c - usaid
c - usaid
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8<br />
Given any method-mix, a (weighted] average value of e can be<br />
caLcuLated.<br />
TFR<br />
.a (2.4)<br />
TFR + 0.4 x (I + C. R x Total induced abortion rate<br />
where tho total induced abortion rate is the average number of<br />
induced abortions per womon at the end of the reproductive period.<br />
The functional form of C 1 s such that it decreases slowLy as TFR<br />
a<br />
goes down.<br />
20<br />
C - .... (2.5)<br />
18.5 + I<br />
where<br />
I is the average duration of postpartum infecundabi lity (in<br />
months) caused by breast-feeding or postpartum abstinence. The<br />
functional form of C I s such that it has a slowly increasing<br />
trend<br />
over time because the average duration of breast-feeding is<br />
getting shorter in comparison to the rather traditional value that<br />
has so far prevai Led In vng ladaah.<br />
Dotal led theoretical justification for the above formulae<br />
has been given by Bongaarts & Potter (1983].<br />
The totaL fecundity rate [TF) can be assumad to have a<br />
fairly stable value<br />
within a narrow range centered at 15.3.<br />
Three of the four indices namely C , C and C take<br />
m c a<br />
different values for the seven five yearly age-groups (15-19 to<br />
45-49]. For example, an increase In the age at marriage means a<br />
decreasing value of C. In the ago-group 15-19, but it may not have<br />
m<br />
any effect on the age-group 45-49 (except in the long run].
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