B. G. Jefferis and J. L. Nichols

“ About two hundred and eighty days will represent the average duration of pregnancy, counting from the last day of the last period. Now it must be borne in mind, that there are many disturbing elements which might cause the young married woman to miss a time. During the first month of pregnancy there is no sign by which the condition may be positively known. The missing of a period, especially in a person who has, been regular for some time, may lead one to suspect it ”

“ It is not essential that the semen be introduced through the medium of the male organ, as it has been demonstrated repeatedly that by means of a syringe and freshly obtained and healthy semen, impregnation can be made to follow by its careful introduction. ”

“ But then, again, there are some rare cases who have menstruated throughout their pregnancy, and also cases where menstruation was never established and pregnancy occurred. Nevertheless, the non-appearance of the period, with other signs, may be taken as presumptive evidence.
5. "ARTIFICIAL IMPREGNATION".—It may not be generally known that union is not essential to impregnation; it is possible for conception to occur without congress. All that is necessary is that seminal animalcules enter the womb and unite there with the egg or ovum. ”