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Added August 01, 2013

How Sex Works

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Birds and BeesHow Sex Works

How an egg becomes fertilized and development begins

During puberty, your body gets ready to possibly become pregnant. Although you are not ready to become a parent, it is important to know how this works.



The process of a woman becoming pregnant and giving birth begins with fertilization. Fertilization is when the egg and sperm join.


It used to be that fertilization happened only through sexual intercourse between a man and a woman. But modern medicine has made it possible for fertilization to happen in other ways, too.


First we'll describe how fertilization happens through sexual intercourse. During sexual intercourse, the man's penis is inserted into the woman's vagina. After a while, the man ejaculates (during orgasm). At this time, the fluid (called semen) containing millions of sperm is released from the opening at the tip of the penis. Some of the sperm "swim" through the vagina into the uterus and then into the fallopian tubes. During sexual intercourse, the woman may also experience the feeling of orgasm, but it's not necessary for fertilization to take place.


Other fertilization methods

Fertilization can also happen through "artificial insemination." With artificial insemination, the man has already released the sperm. The sperm is injected into the vaginausually by a doctor or nurse. The other type of fertilization is called "in vitro." This is actually a medical procedure. Eggs are taken from a woman's body first. In the lab, sperm are added to the eggs. Some fertilized eggs begin to develop into an embryo. One or more embryos are then injected into the woman's uterus. Women who have difficulty getting pregnant may use in vitro fertilization because it increases the chances for pregnancy.


After fertilization

After the egg is fertilized, it moves through the fallopian tube into the uterus. As it "travels" it is also continuing to develop. Once the egg reaches the uterus, it attaches to the uterine lining (called the endometrium). When that happens, the endometrium is not released from the body and a woman does not have her menstrual period. This is why "skipping a period" or "being late" can mean that the woman has become pregnant.


The fertilized egg attaches to the endometrium and develops into an embryo (the name for a newly-fertilized egg). After seven weeks of development, the embryo becomes a fetus.


A normal pregnancy lasts for 38 weeks (about nine months) from fertilization. During this time, as the fetus grows, the uterus grows, too. At birth, the strong muscles of the uterus, as well as those around the vagina and perineum, plus the muscle of the perineum itself, push the baby through the cervix and vagina and out of the woman's body.

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comments so far
Posted August 06, 2014
sex only after marriage
Posted July 29, 2014
When i was four, my mom, who is now 30 and i am 15 (you do the math), tried to explain sex to me. I didn't understand it then and i still don't now. I really thought a uterus was located in your mouth, that little punching bag thing in the back of your mouth. You know the one that if you touch it you'll throw up. So when i read this article, it cleared things up. I realize that the uterus is in the butt and so are the fallopian tubes (although i have no clue what those are). Also, i'm a little confused about where the penis goes because the vagina is in the front but it needs to technically make it to the back...? i'm lost. Well, i guess i'll figure it out cuz me and my boyfriend r having sex tomorrow. His name is Jimbo. He is 97 and he's the love of my life. Thanks beinggirl <3
Posted June 16, 2014
My health teacher told me that we should weight the options...
Posted July 24, 2014
There was a girl (Baby Cakes 210) who posted about her friends 'weird cravings' and that her 'southern region got tremors whenever a guy friend came near'. She asked for help for this situation. Well, first of all, she should tell her friend that it's perfectly normal for her to have these kind of feelings, so there's nothing wrong with her. Eventually the urge will fade away, especially if it happens right before or right after her period. But it also depends a lot on what topics she thinks, watches, or reads about. For example, if she watches too much romantic movies or reads too much on the subject, it will be harder to keep self-control. And the lack of self-control can lead to wrong decisions that can cost both your dignity and well being. So, keep your good judgment and you will save yourself so much heartache!
Posted June 09, 2014
Girls should really take care of themselves. Sex is an important event in a girl's life, but she could also get an unwanted pregnancy. To prevent this, it's better to have sex after you get married with a guy you trust.
Posted July 29, 2014
I don't see any thing with adults having sex because that's how we got here and our siblings.
Posted April 28, 2014
My advice to girls,sex after marriage is the best option to make in life,say no to sex before marriage!its not worth it.
Posted May 08, 2014
Helpful! (but awkward) ;)
Posted May 08, 2014
I think you should only have sex when your married and actually in love
Posted April 21, 2014
can a woman die from having sex?
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