(C) The gestation period is defined as the duration of development of the embryo or fetus from the time of fertilization until birth.In humans,this pe

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The average nine-month period of pregnancy

(C) The gestation period is defined as the duration of development of the embryo or fetus from the time of fertilization until birth.In humans,this period lasts for approximately $280$ days or $9$ months.Therefore,the gestation period refers to the average nine-month period of pregnancy.

Class 12 Biology Human Reproduction Pregnancy and Embryonic development

Easy

What is the gestation period?

A
Lactation period
B
Parturition
C
The average nine-month period of pregnancy
D
Implantation

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Class 12

Biology Questions

Chapter

Human Reproduction

Subtopic

Pregnancy and Embryonic development

Placenta is present in

Easy

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Select the hormones that are produced only during pregnancy.

Medium

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Match the columns:

Column $I$ Column $II$

$(a)$ Third week $(1)$ Development of pre-umbilical cord

$(b)$ Third month $(2)$ Body develops but head remains big

$(c)$ Fourth week $(3)$ Embryonic slit widens

$(d)$ Fourth month $(4)$ Muscles activate

Column $I$	Column $II$
$(a)$ Third week	$(1)$ Development of pre-umbilical cord
$(b)$ Third month	$(2)$ Body develops but head remains big
$(c)$ Fourth week	$(3)$ Embryonic slit widens
$(d)$ Fourth month	$(4)$ Muscles activate