CHAPTER III

. DEVELOPMENT OF THE OVUM, EMBRYO, FETUS, PLACENTA, CORD

AND MEMBRANES. The Ovum. The Spermatozoon. Fertilization. Heredity. Sex-determination. Most Favorable Age for Motherhood. The Morula. Growth in the Uterus. The Decidua. Ectoderm. Mesoderm. Entoderm. The Chorion and Placenta. The Amnion. The Umbilical Cord. The Fetus. Growth by Months. Factors Influencing the Size of Child. Multiple Pregnancy. Extra-uterine Pregnancy.

## CHAPTER IV . GROWTH AND PHYSIOLOGY OF THE FETUS. Circulation. Kidneys.

Bowels. Head. Fontanelles. Occipital Measurements.

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