Page:Contraception; 1st ed. (IA in.ernet.dli.2015.94163).pdf/89

Though far from being a generally secure method, its effectiveness is undeniable in individual cases, and probably depends on the conjunction in the pair of a narrow os and a passive cervix on the part of the woman, and a compact ejaculate on the part of the man; also probably on a fairly good. muscular development on the part of the woman which would tend to voluntary movement of the vaginal canal. Thus the ejaculate would be expelled in a mass, not leaving individual spermatozoa in the vagina.

Comment.—This method has to recommend it the fact that no "artificial" substance or appliance is required. It should not be advised for use by a woman to whom pregnancy is a serious danger, but if one to whom an unexpected pregnancy is not serious chooses to try the method and finds it satisfactory in her own case, it is much less detrimental than many others. I personally disapprove of it because the accessory secretions in the seminal fluid should be retained by the woman longer than is possible in this method, and also because the very act of sitting up and making any definite contractive movement violates the proper psychological atmosphere which should be retained if the act is to be completely beneficial. Therefore I would