... then so I need to know that way I can dodge it
Though your chances of getting pregnant is less when you have your period it is possible. You need to be ovulating to become pregnant. Which is usually about 2 weeks from the first day of the previous period. Since we can have irregular periods it is possible to ovulate more than once a month. The best thing to do is to use some form of birth control at all times! Also remember condoms do not just protect you from pregnancy but also help protect your from STD. Sexually transmitted disease. If your ever on antibiotics and take birth control pills remember this can weaken the effect of the birth control pill so always use a second form of protection for the time your on the antibiotic. What is going on? How old are you?
Yes, it is possible to get pregnant while on your period. Menstruation itself isnt directly involved in fertility. Ovulation is when a woman is fertile. It is possible to ovulate while menstruating. A woman's monthly cycle occurs when hormonal changes cause an egg to ripen in the ovary and between cycles the uterus builds a nice bloody plushy lining, a hormone triggers this ripened egg to be released during ovulation. This is when a woman is fertile. If the egg is fertilized, the cells begin to divide and work their way down the fallopian tube to the uterus where it embeds in this bloody plushy lining where it is protected and nourished until the placenta is fully formed. During most cycles, the egg is never fertilized and passes out of the body and that built up lining is no longer necessary and so it is shed as our "period" or menstruation.
So it is possible that a woman may release another egg while she is still shedding this lining or she may possibly release two eggs at different times of the month. It is very hard to predict ovulation. Most women who use "the calendar method" of birth control must chart and plot her basal temperature and cervical mucus consistency for years before she can accurately predict ovulation and even then nature often throws a curve so this is what makes the calendar method not as accurate as, say, birth control pills. If you DONT want to be pregnant then one must take precautions like using a good method of birth control. Hormonal methods work by changing the hormone triggers so that no egg is released. No egg means no baby, no matter how many sperm are introduced into a woman's body and most hormonal methods are around 96-99.9% depending on consistency of use. Barrier methods like condoms or the Diaphragm prevent sperm from being able to make contact with an egg. Barrier methods fail when either there are holes (and these can be microscopic) where sperm slip through or most often occur because of "user error" like vaginal penetration by the penis for "a few strokes" without the barrier (condom or diaphragm) since males secrete sperm all through the sex act, pulling out before ejaculation or pulling out to put a condom on before ejaculation. If the naked penis penetrates the vagina, fertilization can occur. Another user error is pulling the condom too tight and not leaving a "reservoir" for semen at the end of the condom. Some men ejaculate powerfully and this can break a condom or friction on a too tight condom can cause breakage. A condom shouldnt be pulled on so far that it is smooth at the end. An inch or so at the tip should be left to be a place for the sperm to pool after ejaculation. Another failure is when pulling the condom off, sperm may spill onto the vagina. Sperm deposited outside the vagina causing pregnancy is rare but it does happen. Early in my family planning job, I met a young girl who was pregnant and her hymen was still intact. Her boyfriend ejaculated just before penetration and she got pregnant. That is very very rare but it is a possibility obviously. Another common error is using a condom that has been in a boys wallet for months. Heat causes latex to break down so by carrying it in his wallet, you have a higher chance of breakage due to heat weakened latex. An ill fitting diaphragm can cause sperm to enter the reproductive system or using the diaphragm without spermicide can too. It has to be left in for 6 hours after sex to give the spermicide a chance to kill sperm. It is so much better to prevent pregnancy than to try to stop it after the sex like in Emergency contraceptives. Drugs like Plan b, Next Choice etc. were designed for emergencies (rape) and barrier method failures, not so a couple can think "we can go ahead and have sex now and just take Plan b later" Regular contraceptive pills, as I have said are about 98-99.9% effective when taken perfectly. Average use, missing a pill or taking one or two late, etc. is about 96-98%. Plan b, at its best is about 80% effective. That means you have a 20% chance of getting pregnant anyway! Not to mention that using nothing at all you have about a 15-30% chance of pregnancy and 40% of couples using no protection get pregnant in 3 months or less! So Plan b isnt really that much better than using nothing at all. Also, if a woman takes Plan b more than once in a few cycles, the rate of protection decreases so the more you use it, the less effective it is. It is not meant to be birth control. It is such a huge blast of hormones and it causes a lot of unpleasant side effects (those which are much like pregnancy) it can delay your period, it can cause breast tenderness, bloating, cramping, mood swings, headaches, nausea-all the symptoms of pregnancy at a time that you are worried about "if" you got pregnant to begin with so more than anything it can cause a great deal of emotional stress. If you want to avoid pregnancy, the best way is to get on a regular reliable form of birth control. For many, the Pill is most convenient but there are may types. For long term control, you have IUDs like Mirena, implants about the size of a match stick in your inner under upper arm like Implanon/Nexplanon or the "shot" Depo-Provera. Condoms work quite well if they are used consistently before penetration and in conjunction with spermicidal foam or jelly. Talk to your gynecologist, or local family planning clinic to decide the best method for your lifestyle.
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