Reproductive System

Reproductive System

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Reproductive System Function and Structures

• production of sperm in Males

• production of eggs in Females

• continuation of species by creating babies

Let's Talk Multiple Births

Do you have siblings? How many?

Singleton Births

• more than 4 million babies born in the US each year

• 96% singleton births

• birth weight 4-8 pounds

• weight gives good chance for living outside the mother

Multiple Choice

What is the typical birth weight of a singleton baby?

• 2-3 pounds

• 4-8 pounds

• 4-8 ounces

• 10 pounds

Multiple Choice

The function of the reproductive system is

• undetermined

• continuation of species

• breaking down of food

• transportation of nutrients throughout the body

Twins

• 2 babies

• occur about 3% of the time

• Birth weight of 2-5.5 pounds

• 2 types of twins: Identical & Fraternal

How Twins Happen: IDENTICAL TWINS

• one egg + one sperm

• egg divides into two and separates

• look exactly alike because they have exactly the same genetic makeup

Scott Kelly & Mark Kelly - twin astronauts

FRATERNAL TWINS

• 2 eggs + 2 sperm

• babies develop side by side

• may or may not look alike

• they do not have the same genetic makeup

Multiple Choice

How often are twins born?

• 1%

• 3%

• 20%

• 47%

Multiple Select

Select all that apply to Identical Twins

• one sperm + one egg

• 2 sperm + 1 egg

• egg divides in 2

• offspring look alike

Multiple Choice

2 eggs and 2 sperm are used to create fraternal twins.

• True

• False

6 sets of twins play basketball in Splendora

TRIPLETS

• 3 babies

• occur about .04% of the time

• birth weight 2.5 - 4 pounds

• typically 1 set of twins and a singleton

• can be identical

Multiple Choice

What is the birth weight of triplets?

• 1 - 2 lbs

• 2.5 - 4 lbs

• 5 - 8 lbs

• 9 lbs

QUADRUPLETS

• 4 babies

• occur about .008% of the time

• birth weight 1.5 - 3 pounds

• makes it difficult to live outside mom without help

QUINTUPLETS

• 5 babies

• occur about .002% of the time

• birth weight less than 2 pounds

Fill in the Blanks

How many babies are quadruplets?

SEXTUPLETS

• 6 babies

• occur less than .001% of the time

• birth weight less than 1.5 pounds

• mom usually on fertility drugs

• makes more than one egg be released at a time

SEPTUPLETS

• 7 babies

• occurs less than .001% of the time

• birth weight 1 pound or less

• fertility drugs

• 
  

OCTUPLETS

• 8 babies

• occurs less than .001% of the time

• birth weight 11 oz - 1.5 pounds

• fertility drugs

Octuplets born in Houston in 1998 - 1 died after a week only 11 ounces

Conjoined Twins

• first called "Siamese Twins"

• first celebrity set worked on a circus and were from Thailand - called Siam at that time

• Married 2 women and fathered 21 children

• Died within 3 hours of each other

Some can be separated

Have enough organs and limbs (legs and arms) to live separate lives

Some cannot be separated

Multiple Choice

What is the scientific word for Siamese Twins?

• Fraternal Twins

• Quintuplets

• Conjoined Twins

• Singletons