Question:
A mother who has a fraternal twin is this times more likely to have twins of her own?
Response:
There is no increase in likelihood
100 times more likely
2.5 times more likely to have twins
Fraternal twins come from two separate eggs that are released at once, so a mother’s genetics are involved. This means that there is a higher likelihood that her daughter would also have fraternal twins. In contrast, identical twins come from a random splitting of one fertilized egg, so there would be no increase in likelihood of twins in the next generation.
5 times more likely
About how many eggs are released over an average female’s lifetime?
4 billion
400
Unlike men who produce new sperm throughout their lives, females are born with a finite set of eggs. The average female has about 1 million immature eggs at birth, but throughout her lifetime most of these will die so that only one will mature and be released each month during her menstrual cycle.
1 million
100
How much does a female’s uterus expand by during pregnancy?
100x its size
50x its size
2x its size
500x its size
Following birth, it only takes 6-8 weeks for the uterus to return to its original size.
How long can sperm live once they are ejaculated inside a female’s vagina?
A few days
Sperm ejaculated into a female’s vagina can survive for up to 3 to 5 days. Sperm ejaculated outside of a females body can live up to a few hours.
Two weeks
A week
A few hours
By which week of pregnancy do a baby’s fingernails and toenails start to grow?
11 weeks
Hair follicles also start to grow at 11 weeks!
3 months
7 months
1 week into pregnancy
Aside from Plan B, which of the following options can be used as a form of emergency contraception if a condom breaks during sex?
Plan B is the only acceptable form of emergency contraception
The Paraguard IUD
The Paraguard IUD, or any other copper IUD, can be used as emergency contraception if it is inserted within 5 days after unprotected sex or birth control failure. The Paraguard is a great alternative to using Plan B because it can be let in for up to 10 years to offer long term pregnancy protection.
The Depo Provera Shot
Implanon
Most of the fluid in semen is made up of secretions from which male reproductive organ?
The urethral glands
The prostate gland
The seminal vesicles
Though all of the above contribute to the fluid in semen, 50 to 80 percent of the fluid is from the seminal vesicles. They are a pair of small, tubular glands near the prostate. The fluid contains high fructose concentrations to help provide the sperm cell with nutrient energy.
The testicles
For the females that experience this during pregnancy, when does morning sickness usually appear?
6 weeks
More than 50% of pregnant females experience morning sickness, which includes nausea that may be accompanied by vomiting.
Within the first week of pregnancy
2 weeks
What is the record for the world’s longest pregnancy?
1 year
The world record for the longest pregnancy was placed in 1945 by Beulah Hunter in Los Angeles. Her pregnancy lasted 375 days, while on average pregnancies are about 280 days.
10 months
1 ½ years
2 years
How old are babies when they develop bony kneecaps?
1 year old
1 week old
3 years old
Babies’ knees begin as cartilage so that each fall they take will act more like a sponge than a knee-breaker. Around ages 3-5 the cartilage develops into bone.
2 months old
What hormone allows a pregnant female’s uterus and pelvis to loosen and expand during pregnancy?
hCG
Estrogen
Relaxin
Not only does relaxin help the uterus and pelvis to loosen up, it also affects pregnant females’ feet. Many females temporarily, and some permanently, experience an increase in foot size due to relaxin’s effects of loosening ligaments.
Oxytocin
About how many sperm are released over an average male’s lifetime?
100 million sperm cells
1 billion
500 billion
The average ejaculation contains about 100 million sperm.
500 million