Sometimes in order to figure something out you may have to go about it from the opposite direction. If you do not want to have a baby but you are sexually active, you should first find out when your most fertile days are. The menstrual cycle usually determines when you are the most fertile so you can eliminate those days. The first day of the cycle is when the bleeding starts. After about a week, your hormone levels will begin to escalate which makes you ripe for ovulation. Once ovulation is over and conception was not achieved, your menstrual cycle will start up again in another 12 to 14 days.
When Are You Least Fertile?
The time period that runs the first 7 days of your menstrual cycle are your least fertile days. The question of when you are least fertile is right before your menstrual cycle, during it, and right after menstruating.
The only problem with these calculations is that your menstrual cycle can change, which will also affect when the least fertile days would be. A regular menstrual cycle usually is about 28 days, so ovulation would happen around the middle, or around day 14. Ovulation usually occurs 14 days before your period starts so if you have a shorter cycle, like 21 days, you would begin ovulating earlier, like around day seven.
When Are You Most Fertile?
You are most fertile during ovulation. While this seems like it would be an easy thing to figure out, there are many variables that come into play. Your period may be earlier or later than normal so figuring out the ovulation period would change. Fertility can only occur when an unfertilized egg is released from one of the ovaries. The time that an egg can be fertilized is only 24 hours, but the fact that sperm can remain alive inside a woman for a period up to five days expands the window in which fertility can occur.
If you are wondering "when are you least fertile" it would have to be right after ovulation.As long as you haven’t had sex 5 days prior to ovulation you would be in the clear.
If you want to confirm when you are least fertile, check out this link and enter in your menstrual information:
http://www.webmd.com/baby/healthtool-ovulation-calculator
What You Don’t Know About Fertility May Surprise You
1. Keeping the boys cool
If your guy likes to wear skin tight shorts, his scrotum is going to have to endure temperatures that are not conducive to producing sperm. If you are trying to get pregnant, you need to get your guy a pair of roomy boxers. Loose clothes and a reasonable temperature of 94 to 96 degrees will keep his boys ready to do their job.
2. The nose knows
An unofficial way to tell if you are ovulating is that your sense of smell is at an all-time high. You can pick up scents – good and bad – especially when you are at your most fertile.
3. There’s a small window for conception to occur
As you get into your thirties and you keep trying to get pregnant you may become frustrated. The truth of the matter is you have about a 15 percent chance of getting pregnant on any given month. In fact a recent study found that it took some couples up to 104 times of having sex before they were able to conceive.
4. What do your pearly whites have to do with this?
Believe it or not, the health of your teeth can have an effect on everything from conception to the delivery of your baby. Bad teeth and gums can have an effect on your fella’s sperm, and if your teeth aren’t in good shape it could be responsible for a low-weight baby or even a preemie.
5. Okay, this one might have been researched by a guy…
It has been found that a man’s sperm was much stronger after watching heterosexual porn. Sounds a little suspicious but hey, it’s worth a try if you’ve been trying to conceive.