When you ovulate, one of your ovaries releases a mature egg into the fallopian tube, where it can be fertilized for a narrow window of less than 24 hours. This event, which typically happens around day 14 of a 28-day cycle, is the result of a carefully timed hormonal cascade and triggers a range of physical changes you can actually feel and observe. Here’s what’s happening inside your body and what you might notice.
The Hormonal Chain Reaction
Ovulation doesn’t happen suddenly. It’s the climax of a process that starts days earlier. As a follicle (a tiny fluid-filled sac containing an immature egg) grows on your ovary, it pumps out rising levels of estrogen. By about day seven of your cycle, blood estrogen levels have climbed significantly. When estrogen reaches a critical threshold, usually around day 13, it triggers a sudden surge of luteinizing hormone, or LH. That LH surge is the direct trigger for ovulation, typically causing the egg’s release within 24 to 36 hours.
Inside the follicle, the LH surge sets off a chain of enzyme activity that weakens and breaks down the follicle wall. Enzymes dissolve the collagen holding the follicle together, and the wall thins until it ruptures, releasing the egg along with some fluid. After the egg is gone, the leftover follicle cells transform into a structure called the corpus luteum, which starts producing high amounts of progesterone. This progesterone shift is what defines the second half of your cycle and prepares the uterine lining for a potential pregnancy.
What Ovulation Feels Like
About 1 in 5 people who menstruate feel a distinct twinge or cramp on one side of their lower abdomen around ovulation, a sensation called mittelschmerz (German for “middle pain”). The discomfort likely comes from two things: the growing follicle stretching the surface of the ovary just before it bursts, and the fluid or blood released from the ruptured follicle irritating the abdominal lining.
The pain usually lasts anywhere from a few minutes to a few hours, though it can occasionally persist for a day or two. Some people experience it every cycle, others only now and then, and many never notice it at all. It tends to alternate sides from month to month, since ovulation typically switches between your left and right ovary.
Changes in Cervical Mucus
One of the most noticeable signs of ovulation is a shift in cervical mucus. In the days leading up to egg release, your mucus becomes clear, slippery, and stretchy, often compared to raw egg whites. This is a direct response to the estrogen peak. The consistency is designed to help sperm travel through the cervix and survive longer in the reproductive tract.
Earlier in your cycle, cervical mucus tends to be thicker, stickier, or pasty. After ovulation, rising progesterone dries it up or makes it cloudy and tacky again. Tracking this shift from sticky to stretchy to sticky is one of the oldest and most accessible ways to estimate your fertile window. You can check by wiping before urinating or by gently testing the mucus between two fingers to see if it stretches.
Your Cervix Shifts Position
Your cervix itself changes around ovulation in ways you can detect with a simple self-check. The changes follow what’s sometimes called the SHOW pattern: Soft, High, Open, and Wet. Before ovulation, the cervix sits lower in the vaginal canal and feels firm, like the tip of your nose. As ovulation approaches, rising estrogen causes it to soften (feeling more like your lips), rise higher, and open slightly. It also produces more of that slippery mucus. After ovulation, it drops back down, firms up, and closes again.
A Rise in Body Temperature
Ovulation causes a small but measurable increase in your resting body temperature. Before ovulation, basal body temperature (the temperature you take first thing in the morning before getting out of bed) typically ranges from 96 to 98°F (35.5 to 36.6°C). After ovulation, progesterone from the corpus luteum pushes it up to 97 to 99°F (36.1 to 37.2°C). The shift can be as small as 0.4°F (0.22°C), which is why you need a thermometer that reads to at least one decimal place to catch it.
The important thing to understand is that the temperature rise confirms ovulation has already happened. It doesn’t predict it in advance. By the time you see the shift, your fertile window is closing or already closed. That’s why temperature tracking works best when combined with other signs like mucus changes, or when you’re charting over several months to identify your personal pattern.
Higher Sex Drive and Mood Shifts
Many people notice a bump in libido right around ovulation, and there’s a straightforward hormonal explanation. Estrogen is at its cycle peak, and oxytocin (a hormone linked to arousal and bonding) is also elevated. The combination of these hormones, along with LH itself, likely drives the increase in sexual desire. From an evolutionary perspective, it makes sense: you’re most fertile during this window, so a higher sex drive increases the chance of conception.
Some people also report feeling more energetic, social, or confident in the days surrounding ovulation. These shifts tend to be subtle and vary widely from person to person. After ovulation, as progesterone takes over and estrogen drops, mood and energy often level off or dip, which is part of why the second half of the cycle can feel noticeably different from the first.
The Fertility Window
The egg released during ovulation survives for less than 24 hours. The highest pregnancy rates occur when sperm meets the egg within 4 to 6 hours of ovulation. But because sperm can survive in the reproductive tract for up to five days, your total fertile window stretches from about five days before ovulation through the day of ovulation itself. That’s roughly six days per cycle when pregnancy is possible.
This is why timing matters so much for anyone trying to conceive or avoid pregnancy. If you’re relying on cycle tracking, you need to identify the days before ovulation, not just the day itself, since the egg’s lifespan is so short.
How to Confirm You’re Ovulating
Home ovulation predictor kits test your urine for the LH surge that triggers egg release. These kits are quite accurate: studies comparing them to blood tests found surge detection accuracy ranging from about 92% to 97% across different brands. Interestingly, price doesn’t make much difference. Budget test strips performed just as well as, and in some cases slightly better than, more expensive digital kits in terms of sensitivity.
A positive ovulation test means you’ll likely ovulate within the next day or two, which makes it the most practical tool for timing intercourse around your fertile window. Combining it with cervical mucus tracking and basal temperature charting gives you the most complete picture: mucus changes warn you ovulation is approaching, the LH test narrows the timing, and the temperature shift confirms it happened.