girl boy adolescent youth

THE DETERMINATION OF SEX

The term “The Determination of Sex” is employed in two general senses in scientific circles. The first usage is that of the biologist, and it includes within its scope merely the discovery and understanding of the causes which determine whether the embryo shall develop into a male or into a female. In the discussion of the subject…

girl boy adolescent youth

EUGENICS AND CHARACTER

The rapidly growing interest in Eugenics, and the scientific consideration of the world-wide decline in the birth-rate have drawn attention to the study of the eugenic factors which determine the production of high ability in offspring. Many distinguished investigators have conducted long and exhaustive investigations for the purpose of ascertaining and summarizing all possible biological…

girl boy adolescent youth

PRE-NATAL INFLUENCES

The term “Pre-Natal” of course means “before birth,” and Pre-Natal Influences are those influences exerted upon the child before its birth into the world. The students of Eugenics are vitally interested in the subject of Pre-Natal Influences, as they recognize that therein is to be found the secret of much which will work along the…

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GESTATION OR PREGNANCY

Gestation is “the act of carrying young in the Uterus, from the time of conception to that of parturition.” Conception occurs at the moment of the impregnation of the ovum; parturition is the act of delivery, or childbirth. Pregnancy is “the state of being with child.” The terms “period of gestation,” and “period of pregnancy,”…

girl boy adolescent youth

PHYSIOLOGY OF THE FEMALE SEX ORGANISM

In the preceding lesson you have been shown “just what” each one of the sex organs of the woman is. In the present lesson you will be shown “just what” each of these organs does—what its functions and offices are. The preceding lesson dealt with the anatomy of these organs; the present lesson will deal with the physiology thereof. Beginning with…