Obulating is a common misspelling of “ovulating,” which refers to the moment an ovary releases an egg into the fallopian tube. This happens roughly once per menstrual cycle and is the key event that makes pregnancy possible. On average, ovulation occurs around day 14 of a 28-day cycle, though the exact timing varies from person to person and even cycle to cycle.
What Happens During Ovulation
Your menstrual cycle has two main phases, split by ovulation. The first phase (the follicular phase) lasts anywhere from 14 to 21 days. During this time, a hormone called FSH prompts several small fluid-filled sacs in the ovaries, called follicles, to start developing. Each follicle contains an immature egg. Usually only one follicle becomes dominant and continues to grow.
When that follicle is mature, the brain triggers a large burst of another hormone, LH. This surge causes the follicle to rupture and release its egg. The egg then enters the fallopian tube, where it can be fertilized by sperm. That release is ovulation. After it happens, the second phase (the luteal phase) begins and lasts about 14 days until your next period starts.
How Long the Egg Survives
A released egg lives for less than 24 hours. That’s a surprisingly short window, but the fertile window is actually longer because sperm can survive inside the cervix, uterus, and fallopian tubes for 3 to 5 days. This means you can conceive from sex that happened several days before ovulation, not just on the day itself. The practical fertile window is roughly five to six days: the five days leading up to ovulation plus the day of ovulation.
Signs You May Be Ovulating
Changes in Cervical Mucus
One of the most noticeable signs is a change in vaginal discharge. In the days before ovulation, cervical mucus becomes clear, wet, and slippery, often compared to raw egg whites. This texture helps sperm travel more easily toward the egg. You typically notice this stretchy mucus for about three to four days. After ovulation, the mucus becomes thicker and drier again.
Mild Pelvic Pain
Some people feel a brief pain on one side of the lower abdomen around the time of ovulation. This is sometimes called “middle pain” because it happens midway through the cycle. The sensation can be dull and achy like mild cramps, or sharp and sudden. It typically lasts a few minutes to a few hours, though it can occasionally persist for a day or two. The pain occurs on whichever side is releasing the egg that month, so it may alternate sides from cycle to cycle.
A Slight Rise in Body Temperature
After ovulation, your resting body temperature increases by a small amount, typically less than half a degree Fahrenheit (as little as 0.4°F or as much as 1°F). You won’t feel this shift, but you can detect it by taking your temperature first thing every morning with a sensitive thermometer. The rise confirms ovulation has already happened, so it’s more useful for understanding your cycle patterns over time than for predicting ovulation in the moment.
How to Track Ovulation
Over-the-counter ovulation predictor kits detect the LH surge in your urine, which happens about 24 to 36 hours before the egg is released. A 2024 study in Fertility and Sterility tested five popular brands and found they all demonstrated over 91% accuracy compared to blood hormone levels. You typically start testing a few days before you expect to ovulate and look for a positive result indicating the surge.
Many people combine methods for a clearer picture: tracking cervical mucus, using test strips, and logging basal body temperature over several months. Cycle-tracking apps can help organize this data, but the underlying signs are what matter most.
When Ovulation Doesn’t Happen
Sometimes the body skips ovulation entirely during a cycle. This is called anovulation, and it’s more common than many people realize. It can happen occasionally without any underlying problem, especially if you’ve just started menstruating, are in perimenopause, or are under significant stress.
Persistent anovulation, however, often has an identifiable cause. Polycystic ovary syndrome (PCOS) is one of the most common. In PCOS, higher-than-normal levels of androgens can prevent follicles from maturing enough to release an egg. Other contributing factors include:
- Very low body weight or BMI, which can reduce the hormones needed to trigger ovulation
- Excessive or intense exercise, which has a similar hormonal effect
- Thyroid or pituitary gland disorders, since the pituitary gland produces the hormones that directly drive follicle growth and egg release
- Obesity, which can raise androgen levels and interfere with the cycle
- Primary ovarian insufficiency, where the ovaries stop functioning normally before age 40
If you’re not ovulating regularly, irregular or absent periods are usually the first clue. Getting enough sleep, eating well, exercising moderately, and managing stress all support hormonal balance and can help restore regular ovulation in cases tied to lifestyle factors.