The difference between the embryonic phase and the pre-embryonic phase is that:
A) the embryonic phase occurs during the first two weeks of pregnancy, whereas the pre-embryonic phase describes the period from two to eight weeks of pregnancy.
B) zygote formation occurs after the embryonic phase, whereas blastocyst formation takes place after the pre-embryonic phase.
C) the embryonic phase begins at week nine of pregnancy, whereas the pre-embryonic phase begins at week two.
D) organ formation and development begin during the embryonic phase, whereas blastocyst formation occurs in the pre-embryonic phase.
Question 2
The disorder in which the embryo does not implant properly in the uterine lining during pregnancy is called _____.
A) pre-eclampsia
B) gestational diabetes
C) botulism
D) osteoporosis
Overview of development of embryonic stages.
Embryonic: 2 To 8 Weeks
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Embryonic Period
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