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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 do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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