The Science of ‘Plan B’ – Emergency Contraception


Contraception, with a variety of methods
available many people are able to avoid unintended pregnancies. But what happens
when things don’t go quite as planned? Thanks to modern science a second chance
is possible. So how does emergency contraception or “plan-b” work? And what
exactly is happening inside the female body? During the female menstrual
cycle many hormones are released beginning a chain reaction. The pituitary
gland in the brain releases FSH which stimulates the growth of follicles
and a premature egg in the ovaries. These follicles then release
estrogen which helps prepare the uterus lining
and triggers the brain to release leutinizing hormone or LH. LH then
triggers ovulation in which the egg is released into the fallopian tubes where it
will spend around twelve to twenty-four hours waiting to be fertilized. If the
egg isn’t fertilized in this time it begins to dissolve and is shed away with
the uterine lining during menstruation. Though this window of opportunity is brief
it’s increased by the fact that sperm can live for up to five days. So the keen sperm from days ago show up early to the show anxiously awaiting ovulation. Birth control pills taken on a regular
basis modify these hormone levels. By increasing progestin levels the body
thinks it’s already released an egg or already pregnant. It effectively decreases FSH and LH and the cycle halts. But in the case of emergency contraception which is only
taken if regular contraception methods fail, a few different mechanisms take place.
The most important thing to understand is that fertilization doesn’t happen
immediately or even within hours after intercourse. Instead the sperm must
undergo a few biological changes in the fallopian tube first which takes time. This is why emergency contraception is still possible the morning after. It can actually work up to five days
after intercourse. If taken during the first half of the menstrual cycle,
emergency contraception works specifically to prevent ovulation. This way the egg is not released even
though it may be ready and the available sperm cannot fertilize it. In cases where it’s too late to inhibit ovulation emergency contraception is thought to
also thicken cervical mucus trapping sperm. As well, it may directly inhibit
fertilization between sperm and egg. Clinical studies show that emergency
contraception prevents pregnancy before fertilization. No studies have
shown an effect from emergency contraception if fertilization has
already occurred. It does not stop implantation from happening nor does it
have any effect after implantation has occurred. In this way, its unable to cause an abortion. And while there are some minor side effects to
these drugs, such as nausea and headaches, scientific studies have demonstrated its
safety in women of all ages and found that the benefits far outweigh any risks.
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100 Replies to “The Science of ‘Plan B’ – Emergency Contraception”

  1. Plan B only prevents a fertilized egg from attaching to the uterine wall, and many fertilized eggs already are flushed from the uterus naturally, but you’ll still have the far right religious crowd screaming that it’s abortion.

  2. Guys please help me,I just had an accidental ejaculation inside of her and we immediately ran to CVS and bought a planB pill,she took it an hour after the accident and also she's on her 6 day in her period,the condom had blood specs from her period,what are my chances of success? Please help.

  3. “life begins at conception so prolifers shouldn’t have a problem with it.” a lot of the prolifers i’d assume are also catholic or something which would make them against any form of contraception. they’d say if god wanted to give you a baby you should accept his gift. not saying i’d agree haha

  4. I hope someone can help me with this question. So i took the pill and two weeks later i got my period, but now i havent got my period for four days, and this is my second period after i took the pill, is this an effect from the pill? Or should i be worried?

  5. I've had to fork out money for a good half dozen of "oopsies" back when I was dating this girl freshman year of college. I'm 30 now, in a happy relationship, and can only imagine how different my life would be if I became a father when I wasn't ready to be one.

  6. What happens if you take Plan B consistently ? Im assuming it can be harmful in the long run, but I would like to know what are the effects after consuming so many. Estimate of 1 Pill almost every month for 1 year.

  7. What if u have 3 plan B's in a month? And dont get periods for 50 days and counting.. what do u say about the safety of these pills then?

  8. Loovee the video !! Although there are a lot more long term side effects from taking Plan B then anybody talks about. It messes up a women's period for a very long time which goes beyond the initial headaches and nausea which I can back from life experience!

  9. that's not true.. pills like i pills do permanent damage… i have suffered a lot. try not to depend on the pill ladies.

  10. Plan B can be around $50, so I recommend trying to get it at the doctors office. I was able to get plan B for free using my health insurance at the teen clinic. This may not work for everyone's insurance but it is definitely something to look into to save money

  11. I ate a contraceptive and got period after a week of having s**.but I missed my periods in the next month!
    what should I do now

  12. Thank you for this video! I wish the church ladies at my church in Diamond Bar, CA would see this. I cannot stand it when they are trying to get parishiners to sign a petition to make it illegal in CA to purchase Plan B. They have posters saying how it's murder if you use it with pictures of fetuses all the way up to 9 months. I wanted to go up to them and scream at them and tell them they don't know what hell they're talking about. So frustrating.

  13. Can you make a video on the Depo- Provera shot birth control and what it does to you're body?

  14. Unpopular opinion: There’s no such thing as unintended pregnancy unless it’s rape. If semen is near a vagina, your body is intending for pregnancy. It’s not just a fun time killer. It is your body’s reproductive process. Js.

  15. 9In just throwing this out there. Life does not begin at conception. The egg and sperm are both alive already. Life doesnt begin with conception, it simply becomes a more complex form of life.

  16. Just Incase y’all didn’t know. Plan Bs cost $50. Ik some teenager did something wrong now they looking at this video.

  17. Can you talk more on the spermacide topic like the gel , vcf or other forms it would be super super super informative for people who want the close contact without condoms and the crazy hormones and weight gain from birth control.

  18. So the condom broke she is on birth control i did cum inside and shes on birth control and had just switched brith control brands 5 days before this happened but the night before she for her pill at 9:00 pm like she usually takes it so she took it in the morning before it happend are we okay or what should we do im only 17!! Please help.

  19. Is it true that if u suddenly stop taking birth control pills, ur gonna be 100% pregnant? Even without having intercourse again.

  20. For anyone watching the video. Here are a few important things to know.
    1. The brand Plan B is less effective on women who weigh 165lbs and its completely ineffective at 176lbs+
    2. If you are over the 165lbs mark there are still good options like the pill Ella.
    3. There are medications that can prevent plan B form working properly, so read the medication interaction list.
    4. For anyone who has the money or the ability to get it done quickly, a copper IUD is a good option and you get a non hormonal birth control that can last up to 12 years.

  21. Some months ago I had to take plan-b because I thought that he might had ejaculated in me. The symptoms I noticed was cramps, my period came a little earlier and lasted for 15 days instead of 6!!! I didn't notice any mood changes. It was a painful experience but totally worth it because if he really did ejaculate inside me, I could get pregnant.

  22. My girlfriend took hers ruffly between 20-40 minutes after i came in her and it worked but she did experience mood changes and a few bipolar side effects but her cycle came on time. I know most don’t reply their experience and it annoyed me 😂😂so hope this helps alot of people stay calm

  23. It says on the Plan B box that it might prevent implantation of a fertilized egg.
    Thats what it says on the box.. Just saying.

  24. If the the "plan B" reduces the possibility of implantation by thinning the uterus lining doesn't that help stop implantation even after fertilization? (implantation and fertilization are not the same thing btw.

    Fertilization is the formation of a zygote and it undergoes mitosis/cleavage before entering the uterus as a blastocyte and implants in the uteru's wall which is in-turn implantation)

  25. Basically, it prevents conception you religious fucktards. Go to hell with your ‘life begins at conception’ argument.

  26. I have a burning question, if you may. If intercourse takes place DURING periods(during which time the egg has already apparently dissolved), will fertilization happen? Why can't women have intercourse during their periods?

  27. Been through this about 7 or 8 times. Still no babies at least not that I know of. Sperm can reach the egg in as little as 30 minutes or as long as 5 days. Best to act quick!

  28. No it works just like regular birth control except is has a higher dosage. It is still possible to conceive a child and the fertilized egg not being able to attch to the wall for survival. You can't just make a YouTube video and say that's all folks.

  29. Plan B can be taken up to three days after conception. The Plan B product information indicates that the main purpose of the drug is to prevent ovulation or fertilization, but the statement that fully reveals the danger of Plan B reads, “In addition, it may inhibit implantation (by altering the endometrium).” This means that Plan B can prevent a fertilized egg from attaching to a woman’s womb by causing the lining to thin. Plan B is thus denying the fertilized egg to obtain the nutrients it needs to survive. Dr. Donna Harrison, a board member of the American Association of Pro-Life Obstetricians and Gynecologists, “In a woman who is already pregnant, [Plan B] will cause an abortion, just like RU-486 does, because it’s the same kind of drug.”

  30. OBJECTION! https://www.walmart.com/ip/Plan-B-One-Step-Levonorgestrel-1-5-Mg-Emergency-Contraceptive-Tablet-1-Ea/29131740THIS IS ABORTION, the back panel says that Plan B "prevents attachment of a fertilized egg to the uterus"Stop this evil Plan B now!

  31. Love all your informative videos that are uniquely presented!! I enjoy watching them!!! Thank you AsapSCIENCE!!!! 😍🤗♥️

  32. But not only are contraceptives abortifacient, birth control does damage to women, to their cervix, and many other parts of their bodies. And not only this, but birth control is lying with your body. You're not actually giving all of yourself to your spouse. If you're not married, then you're not loving in the first place because you're not even committed. But to speak on the married and contraception, they act against their own bodies because they lie with their bodies, and they act against their own commitment.

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