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developmental
stages
MALE REPRODUCTIVE ORGAN
Males and females are practically identical in the first several weeks following fertilization, except for their chromosomes. Mens have one X and a Y chromosome (XY), whereas females have two X chromosomes (XX). Subsequently, during the second month after fertilization, genes on the Y chromosome of men stimulate testosterone release. Testosterone causes the reproductive organs to grow into male organs. (Without testosterone, the reproductive organs invariably develop into female organs.) Although males have male reproductive organs at birth, the organs are immature and cannot yet generate sperm or release testosterone.
PUBERTY AND ITS CHANGES
Males and females are practically identical in the first several weeks following fertilization, except for their chromosomes. Mens have one X and a Y chromosome (XY), whereas females have two X chromosomes (XX). Subsequently, during the second month after fertilization, genes on the Y chromosome of men stimulate testosterone release. Testosterone causes the reproductive organs to grow into male organs. (Without testosterone, the reproductive organs invariably develop into female organs.) Although males have male reproductive organs at birth, the organs are immature and cannot yet generate sperm or release testosterone.
Rapid growth is another noticeable alteration that happens throughout puberty, which is the teenage growth spurt. It is regulated by testosterone in boys. During puberty, the pace of growth typically begins to accelerate. Height growth in the average guy is around 10 centimeters (nearly 4 inches) every year at its peak. In recent years, growth has been typically rapid. Muscle growth and development occur after the height growth spurt. Muscles may continue to develop and acquire strength after height growth is complete.
FEMALE REPRODUCTIVE ORGAN
External and internal structures make up the female reproductive anatomy. The exterior female reproductive structures (genital) serve two purposes: (1) allowing sperm to enter the body and (2) protecting the interior genital organs from pathogenic germs.
female Reproductive structure
PUBERTY AND ITS CHANGES
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Students in junior high school through college are considered to be in puberty (adolescence). The first half of this time may be called puberty, and the second half as adolescence.
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During this time, one's sense of values is formed. According to psychologist Erick Erikson's life-cycle theory, a person's identity is formed during this time through recurring conflicts between the pursuit of ideals and varied setbacks.
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The average age of first menstruation is now between 12 and 13 years old.
menstrual cycle
Females of reproductive age go through cycles of hormonal activity that last around one month. Menstrual cycle pertains to the periodic shedding of the uterine lining. The usual menstrual cycle lasts approximately 28 days and is divided into phases. These phases are:
Follicular Phase
(the egg's development) Begins on your period's first day.
Ovulatory Phase
(the egg's release)
It usually begins 14 days after the follicular phase has begun, however this can vary. Between the follicular and luteal phases, the ovulatory phase occurs. After ovulation, most women will have their period 10 to 16 days later.
Luteal Phase
(if the egg fails to implant, hormone levels drop): Following ovulation, the luteal phase begins.