(i) True, natural abortion (miscarriage) also happens.
This may be due to poor health of mother or poor development of foetus. Sometimes, the uterus of mother is not well developed to continue pregnancy.
(ii) True, complete lactation has been reported to be effective, but only upto a maximum period of six months following parturition.
(iii) True, awareness of sex-related issues will lead to reduction of unhealthy reproductive practices.