This calculator will help you answer the important questions surrounding getting pregnant and let you know when your most fertile days are, and if you are fertile today!
How do I calculate if I am fertile today?
Just enter the first day of your last menstrual period, and the average number of days in your menstrual cycle (the days between your first and last menstrual period). babyMed will then calculate your fertile days.
Calculate the most fertile days
Couples who are trying to conceive naturally wonder when they are more fertile. The most fertile period for women are the 4-5 days before ovulation begins and the day of ovulation. You cannot get pregnant having sex the day after ovulation. As sperm can live up to five days once deposited, having intercourse a few days before ovulation, during your fertile days, allows sperm to travel closer to the egg before it is released. Tracking fertile days is the best way to determine the optimal time to conceive.
Use a Calendar
On a common wall calendar, mark the first day of your period. When your next period starts, mark the day before on the calendar. Continue marking the first and day before the first day of your menstrual cycle for several months. Average the days between your periods together to determine the average length of your cycle. For instance, if you tracked for three months and noted 30, 31 and 29 days the average length of your menstrual cycle would be 30 days.
Ovulation occurs about 14 days before the next expected period. In a 30 day cycle that would be day 16 (30 minus 14), ovulation would typically occur on the 16th day of the cycle. Intercourse should be planned for the three to four days before the 15th cycle day and on the ovulation day to take advantage of the most fertile days in your cycle.
The Babymed Fertility and Ovulation Calendar will show you exactly when you should expect to be fertile.
Cervical mucus will change as ovulation comes closer. The mucus is normally thick and glue-like. Start noting the characteristic of your cervical mucus on the first day after your menstrual cycle stops. About five to seven days later, there should be a change in the feeling and look of cervical mucus. The mucus will change from that thick, glue-like consistency to being thin and stretchy. This is a great sign of your coming fertile days, and now is the time to have sex!
More Subtle Signs
- Slight cramping is often noted about two days before ovulation.
- Sex drive may also increase due to a sharp decline in estrogen levels.
- The basal metabolic temperature may slightly rise.
What happens to fertility after ovulation?
Before a pregnancy can take place, one of your ovaries must release a viable egg. This is called ovulation, and it is a one-day occurence. After ovulation, after the egg has ejected from the ovary, the egg starts dying and will be dead within 12-24 hours after ovulation. Sperm has to be already present at that time.
Sperm can live in a woman’s body for up to five days after intercourse but requires at least 9 hours to get ready for fertilization, so to make love exactly when you ovulate or shortly afterward is often too late to help you get pregnant.
How many days am I fertile each month?
There are 5-6 fertile days each month: the day of ovulation and the 5-6 days before ovulation. So there are about 6 days where you are able to get pregnant each month.
How does the menstrual cycle determine fertility?
Assuming you have a 28-day cycle, you are expected to ovulate about 14 days before the next menstrual period or about 14-15 days into the cycle. With a 28 day cycle, your fertile days are cycle days 9-15. With a 28-day cycle, if you have intercourse on day 12, and ovulate on day 14, you can get pregnant. If you have a 35-day cycle, then you are expected to ovulate on cycle day 21 (35 minus 14 equals 21). So your fertile days will be cycle days 15-21.