A woman is most fertile during her ovulation period as this is the time when an egg is released from the ovaries into the fallopian tube. The Oestrogen produces the luteinizing hormone (LH), which is primarily responsible for the release of the egg from the ovaries. Once released, it takes about twenty four hours for the egg to become ready for fertilization. This is known as the ovulation period. If someone is willing to become pregnant, then she should have sexual intercourse with her partner during this time as she would be most fertile and thus most likely to conceive. If she has sex with her partner at the exact day of ovulation, then the chances of becoming pregnant are the highest, but that does not mean that having sex a few days before or after the ovulation cannot make her pregnant. After an ejaculation inside the vagina, the sperm cells can survive for anything between two to seven days, therefore it is possible to get pregnant even if a woman has sex two or three days before or after her ovulation period, but the chances would be comparatively lower.
To determine the most fertile day in a woman’s menstrual cycle, she needs to find out the total number of days that constitutes her period cycle first. Although it is generally 28 days for most women, an entire menstrual cycle can last from anything between 24 days to 35 days. After the total number of days is determined, she must now use the calendar to first mark the last day of her menstrual cycle and then subtract 14 days from the last day of her periods. The date which she will reach now should be the day on which she would be most fertile. However, even the ovulation day may vary in case of some women and thus additional care should be taken to help determine the exact date of ovulation. Taking note of the cervical mucus, basal body temperature and also the use of modern ovulation predictor kits are all advised if a woman wants to establish her most fertile period.