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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
Most miscarriages _________.
- a. occur in the first trimester
- b. are caused by exposure to a pathogen
- c. can be prevented by a cesarean section
- d. threaten the life of the mother
Concept introduction: Miscarriage is the loss of conception or pregnancy due to spontaneous abortion. It is the natural death of the embryo or fetus before it gains the ability to survive on its own.
Reasons for the correct statement:
Chromosomal abnormalities, occupational hazards, infections, surgical procedures, and accidents are common causes of miscarriage. Signs include vaginal spotting, passing out of vaginal tissue, abdominal pains, and cramps. Miscarriages are very common during the first trimester because the first three months that constitute the first trimester is the important developing period of the youngling. Any factor that causes an unfavorable environment for the development of the fetus leads to a miscarriage.
Option a. is given as “occurs in the first trimester”
As most miscarriages often occur in the first trimester, option a. is correct.
Reasons for the incorrect statements:
Option b. is given as “are caused by exposure to a pathogen”.
Infection-induced miscarriages are not known; there are only theories about it that are prevalent...
Chapter 42 Solutions
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