The Science Of Puberty: Gonadotropins And Reproductive Maturation

The Science Of Puberty: Gonadotropins And Reproductive Maturation

Question 1. Name the phases of menstrual cycle.
Answer:

Phases of menstrual cycle:

• Menstrual phase
• Proliferative phase
• Ovulatory phase
• Secretory phase

Question 2. What is the normal range of sperm count? What is sterility?
Answer:

Normal sperm count:

• 100-150 million/ml of semen

Sterility:

• When sperm count falls below 20 million/ml it is called sterility

Question 3. Human chorionic gonadotropinin
Answer:

• It is formed by placenta immediately after implantation of the fertilized ovum
• It is responsible for preservation and secretory activity of corpus luteum
• It stimulates the interstitial cells of leydig to secrete testosterone

Question 4. Puberty
Answer:

• After birth, the gonads of both sexes remain inactive till they are activated by gonadotropins to bring about final maturation of the reproductive system
• This period of growth and maturation is known as puberty
• Age- varies in boys and girls
• Boys 9-14 years
• Girls-8-13 years

Applied aspect:

1. Delayed or absent puberty

• Occurs if first menstrual period fails to occur by age of 17 years or testicular development by age of 20 years

2. Precocious puberty

• Early development of secondary sexual characteristics with/without gametogenesis is called precocious puberty