The marriage-rate in England and Wales commenced to decline about three years before the sudden change in the birth-rate of 1877, and continued to fall till about 1880, but has maintained a fairly uniform standard since then, rising slightly in fact, the birth-rate, meanwhile, descending rapidly. CHAPTER IV. MEANS ADOPTED. _Family Responsibility--Natural fertility undiminished.--Voluntary prevention and physiological knowledge.--New Zealand experience.--Diminishing influence of delayed marriage.--Practice of abortion.--Popular sympathy in criminal cases.--Absence of complicating issues in New Zealand.--Colonial desire for comfort and happiness._ There is a gradually increasing consensus of opinion amongst statisticians, that the explanation of the decrease in the number of births is to be found in the desire of married persons to limit the family they have to rear and educate, and the voluntary practice of certain checks to conception in order to fulfil this desire. It is assumed that there is no diminution in the natural fertility of either sex. There is no evidence to show that sexual desire is not as powerful and universal as it ever was in the history of the race; nor is there any evidence to show that the generative elements have lost any of their fertilizing and developmental properties and power. Dr. J.S. Billings in the June number of the _Forum_ for 1893, says that "the most important factor in the change is the deliberate and voluntary avoidance or prevention of child-bearing on the part of a steadily increasing number of married people, who not only prefer to have but few children, but who know how to obtain their wish." He further says, "there is no good reason for thinking that there is a diminished power to produce children in either sex." M. Arsène Dumont in "Natalite et Democratie" discusses the declining birth-rate of France, and finds the cause to be the voluntary prevention of child-bearing on the part of the people, going so far as to say that where large families occur amongst the peasantry, it is due to ignorance of the means of prevention. The birth-rate in none of the civilized countries of the world has diminished so rapidly as in New Zealand. It was 40.8 in 1880; it was 25.6 in 1900, a loss of 15.2 births per 1000 of the population in 20 years. There is no known economic cause for this decline. The prosperity of the Colony has been most marked during these years. Observation and statistics force upon us the conclusion that voluntary effort upon the part of married couples to prevent conception is the one great cause of the low and declining birth-rate. The means adopted are artificial checks and intermittent sexual restraint, within the marriage bond, the latter tending to replace the former amongst normal women, as physiological knowledge spreads. Delayed marriage still has its influence on the birth-rate, but with the spread of the same knowledge, that influence is a distinguishing quantity.