LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 9781319145125
Author: Sadava
Publisher: MAC HIGHER
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Chapter 43.5, Problem 3R
Summary Introduction
To review:
The embryo of the first trimester is sensitive to environmental risks.
Introduction:
In mammals, pregnancy occurs when the fertilized egg (zygote) gets implanted in the endometrium of the mother’s uterus. The period of bearing the developing embryo or fetus inside the womb till its birth is referred to as gestation. In humans, the gestation period is categorized into three trimesters, each having a period of three months.
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