To compare: The structures of the zygote, morula, and blastocyst and contrast them. Concept introduction: Gestation or pregnancy is the period during which offspring develops within the uterus of a sexually mature woman. It involves several developmental stages of fetus. In humans, pregnancy is nearly nine months long, divided into three trimesters, involving several changes in the mother and the growing fetus.

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Chapter 29.2, Problem 5LO

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To compare: The structures of the zygote, morula, and blastocyst and contrast them.

Concept introduction: Gestation or pregnancy is the period during which offspring develops within the uterus of a sexually mature woman. It involves several developmental stages of fetus. In humans, pregnancy is nearly nine months long, divided into three trimesters, involving several changes in the mother and the growing fetus.

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