Knowing your conception date helps with pregnancy tracking. Once you’ve confirmed that you’re pregnant, of course, you’ll want to know when you can expect your baby’s arrival. If any of these steps fail, the egg will die and be excreted during your next period, and the ovulation process will begin again for the next month. Implantation generally occurs between 8 – 10 days after ovulation. (The short answer? Have sex two to three days before you ovulate!)įinally, the now-fertilized egg must complete its journey to the uterus and implant in the uterine wall. Since the window of fertility is quite short, using an ovulation calculator, or maintaining an up-to-date ovulation calendar or fertility calendar can help you keep track of the best time to get pregnant. The healthiest sperm can remain viable inside a woman’s body up to five days when fertile cervical mucus is present. Once an egg is released, it must be fertilized within 12 – 24 hours, or the egg will no longer be viable. (But again: cycle tracking will show you more precisely when you ovulate, instead of using a formula to arrive at an estimate.) If you’re wondering when ovulation occurs, it varies for each woman, but on average, it happens around 14 days after the beginning of your period. The resulting egg release-triggered by the LH surge-is called ovulation. This surge ruptures the follicle, releasing a mature egg, which then begins traveling through the fallopian tubes that connect the ovaries to the uterus. One follicle will become dominant and begin secreting estradiol, which will cause a surge in luteinizing hormone (LH). What is ovulation?ĭuring the follicular phase-the first half of your cycle-the fluid-filled sacs in your ovaries (follicles) that contain immature eggs will grow. Rather, it’s a two-part process that includes both conception (fertilization of the egg after ovulation) as well as implantation. If you’re trying to figure out when conception occurred, it’s important to know that conception isn’t the whole story of when your pregnancy began. For accurate information about your specific fertile window, tracking your cycle is really helpful. **14 (the average number of days between LMP and ovulation ) + 9 (the average number of days between ovulation and implantation) = 23 days.Īgain, it’s important to note that the above formulas are just a rough guess based on when ovulation and implantation tend to happen on average for most women. *The average viable embryo implants at 9 days post ovulation. If you know the first day of your last menstrual period (LMP), add 23** days. If you know the date you ovulated, add 9* days. You can figure out this date using a couple of simple formulas (which we’ve also covered in our implantation calculator post).
When you’re trying to determine when your pregnancy began, the date you’re really looking for is implantation-when the fertilized egg burrowed into your uterine lining, thereby beginning your pregnancy. But the truth is that online calculators (which use formulas) will only give you an estimate of your conception date.īefore we dive into understanding the complex process of conception, let’s take a look at how these conception calculators typically work. And if you do, you’ll find loads of online calculators that promise to give you your conception date. We have created a slew of pregnancy calculators and tools to help you through your pregnancy.As soon as you get a positive pregnancy test, the first thing you probably want to do is type “conception calculator” or “When did I conceive?” into Google. Pregnancy Calendarįollow your baby's development week by week in our article series. If you want to, you can view a sample due date report. Timeline of Significant Milestones in Embryo/Fetal Development.Due Dates for Multiples (Twins, Triplets, Quads).Each due date report contains the following data: A normal pregnancy can last anywhere between 38 and 42 weeks. Most are born within a week either side of the estimated due date. On average only 5% of births take place exactly on the estimated due date. Be sure to talk to your health care provider about your due date. Every pregnancy is unique and your baby will come when it's ready. Please remember that your due date is only an estimate. If you deliver on your due date, your baby is actually only 38 weeks old, not 40. Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy. Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle). Pregnancy induced hypertension How is my due date calculated?
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