Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 18 - Section 18.4 - Pregnancy and Birth - Check Your Progress - Page 402: 3

Answer

Stage 1. Cervical dilation--from beginning to complete dilation of cervix Stage 2: Expulsion Stage--from complete cervical dilation to delivery (expulsion) of fetus Stage 3. Placental stage-- from delivery of fetus to expulsion of placenta Note: After the delivery of the placenta, the mother's systems takes several hours (4-6) to return to regular functioning. This period is sometimes considered an extra stage.

Work Step by Step

Stage 1. Cervical dilation--from beginning to complete dilation of cervix Stage 2: Expulsion Stage--from complete cervical dilation to delivery (expulsion) of fetus Stage 3. Placental stage-- from delivery of fetus to expulsion of placenta Note: After the delivery of the placenta, the mother's systems takes several hours (4-6) to return to regular functioning. This period is sometimes considered an extra stage.
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