Scientists are now confirming what every great grandmother used to take for granted namely, that breastfeeding both contributes to lower fertility and also increases the birth interval.
A recent article in The Lancet alleges that breastfeeding provides more than a 98 per cent contraceptive effect in the first six months after birth. A maximum birth spacing can be achieved when a mother solely or nearly solely breastfeeds her baby and does not menstruate. This could provide an easy, nutritious and cheap means of population control in third world countries, says a Lancet noticeboard follow up.