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Changes during puberty

Puberty happens to every young person some time after the age of 8. It is the transition into woman/manhood when the sex organs growand develop and the body becomes ready and able to reproduce. These changes can make you feel proud and happy, and they can also make you feel confused orembarrassed.

  • Your height, weight, and muscles develop
  • Your sex organs grow
  • You become fertile
  • The glands in your skin become more active and can give you spots
  • Your sweat glands develop
  • Hair starts to grow under your arms and around your genitals
  • You may experience rapid mood swings
  • You may begin to be attracted towards members of the opposite or same sex

Changes that affect girls:

  • Your breasts develop and may feel painful as they grow
  • Your nipples begin to stand out
  • Your hips get rounder
  • Your ovaries start to produce ova or egg cells
  • Later in puberty, menstruation starts

Changes that affect boys:

  • Your chest and shoulders develop
  • Your voice deepens
  • Hairs start growing on your face and may grow on your chest
  • Your penis and testicles grow larger
  • Your testicles drop into the scrotum and start to produce sperm
  • You may have erections without warning
  • You will experience your first ejaculation when liquid called semen comes out of your penis (this can also happen when you are asleep.)

The a-b-c approach

Abstaining from sexual activity, faithfulness, and condom use are three behaviors that can prevent or reduce the likelihood ofsexual transmission of HIV infection. These behaviors are often considered together as the "ABCs" of HIV prevention - A for abstinence (or delayed sexual initiation among youth), B for being faithful (or reducing one's number of sexual partners), and C for condom use, especially for casual sexual activity and other high-risk situations.

Understanding and promoting these behaviors are key elements in combating the spread of HIV/AIDS. Based on a growing body ofevidence from a number of developing countries, USAID supports the ABC approach because it can target and balance A, B, and C interventionsaccording to the needs of different at-risk populations and the specific circumstances of a particular country confronting the epidemic.

Background: The Decline of HIV Prevalence in Uganda

As one of the world's earliest success stories in confronting AIDS - and probably the most dramatic - Uganda experiencedsubstantial declines in HIV prevalence during the 1990s. According to estimates by the U.S. Census Bureau and UNAIDS, national prevalence peakedat around 15 percent in 1991 and fell to 5 percent by 2001. Among pregnant women in urban areas, prevalence declined from a high of approximately 30percent to about 10 percent, while among rural pregnant women it fell from more than 10 to less than 5 percent. Uganda's vivid decline in HIV prevalenceremains unique worldwide. In other sub-Saharan African countries with epidemics of comparable severity and longevity, similar declines have yetto occur. Accordingly, Uganda's success has been the subject of intense study and analysis.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, Hiv-aids for educators. OpenStax CNX. Mar 07, 2006 Download for free at http://cnx.org/content/col10329/1.6
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