Module 4 Fertilization to Birth

2.4.3 page 2

Explore

 

Understanding the events of parturition can be gained by doing the following reading and by watching the following video clip. You may choose in which order you would like to begin learning about labour and lactation.

 

Read

 

Learn how the stages of parturition and lactation progress by reading textbook pages 523 to 526. 

 

Watch and Listen

 

While viewing the following video clip, pay particular attention to the roles of nerve stimulation and hormone control on both parturition and lactation. It is recommended that you take notes while viewing of this video. 

Parturition

 

Try This

 

TR 1. Try your hand at labeling the following hormonal control flow chart of the positive feedback mechanism that directs parturition.

 

Positive Feedback Mechanisms Controlling Parturition

 

Inquiry into Biology (Whitby, ON: McGraw-Hill Ryerson, 2007), BLM15.2.3,Reproduced by permission.

 

TR 2. Label the following diagram.

 

Milk Production and Secretion

 

Inquiry into Biology (Whitby, ON: McGraw-Hill Ryerson, 2007), BLM15.2.6,Reproduced by permission.

 

Check your work.

 

Discuss

Through your discussion board, discuss one, some, or all of the following questions:

1. Why do many women choose to give birth in water?
2. How do you feel about men becoming impregnated (yes, it is happening)?
3. How would a man deliver a baby?
4. What is a ‘wet nurse’ and why were they used?
5. With present technology, all parts of conception and birthing of an offspring can be controlled.  What extent of control do you believe people should have over this process?

Self Check

 

Did you know that the greatest number of children born to one Woman is 69? In the 1700's a Woman from Russia had 16 sets of twins, 7 sets of triplets, and 4 sets of quadruplets!

Check your understanding of parturition and lactation by completing questions 29 to 32 on page 526.