John W. Huffman
Contributor
Professor of Obstetrics and Gynecology, Medical School, Northwestern University, Chicago, 1962β73. Author of Gynecology and Obstetrics.
Primary Contributions (2)
Pregnancy, process and series of changes that take place in a womanβs organs and tissues as a result of a developing fetus. The entire process from fertilization to birth takes an average of 266β270 days, or about nine months. (For pregnancies other than those in humans, see gestation.) A newβ¦
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