All of the following statements concerning methods limiting family size, are true, except :
The barrier methods (condoms and diaphragms) are perhaps the most effective at limiting family size
Women who do not breastfeed are much more likely to become pregnant than those who do
Globally the number of tubectomies far exceeds the number of vasectomies
The barrier methods (condoms and diaphragms) are perhaps the most effective at limiting family size
All anovulatory drugs are paicularly likely to cause effects in women over 35 years of age and women who smoke