Which of the Following Happens During the First Trimester of Pregnancy

question 33

Multiple Choice

Which of the following happens during the first trimester of pregnancy?

• A)Chemical messages are sent to the brain to start menstruation.
• B)A woman can no longer tell if she's pregnant by using a urine test.
• C)The cervix thins and begins to stretch.
• D)The zygote implants itself in the lining of the uterus.

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