HerWellOvulation Cramps: What They Are and Why You Get Them
That sharp pain mid-cycle is not random. Learn exactly what ovulation cramps (Mittelschmerz) are, why they happen, and when to see a doctor.
If you have ever felt a sudden, sharp twinge of pain on one side of your lower abdomen around the middle of your cycle - you may have experienced ovulation cramps, medically known as Mittelschmerz (German for "middle pain").
What Exactly Is Happening?
Each month, one of your ovaries prepares a dominant follicle containing an egg. Around day 14 of a 28-day cycle, a surge of Luteinising Hormone (LH) triggers the follicle to rupture and release the egg - this is ovulation.
The cramping sensation comes from two things:
- Follicular fluid released from the ruptured follicle irritates the lining of the abdominal cavity (the peritoneum), which is very sensitive.
- Muscular contractions of the fallopian tube as it sweeps the egg toward the uterus.
What Does Ovulation Pain Feel Like?
The experience varies dramatically between women. It may feel like:
- A quick, sharp stab lasting seconds
- A dull, persistent ache on one side that lasts a few hours
- A cramp that switches sides from cycle to cycle (because ovulation alternates between ovaries)
Location is the key clue - ovulation pain is almost always felt on one side only, in the lower abdomen.
Is Ovulation Pain Normal?
Yes. Research suggests around 20% of women experience some degree of Mittelschmerz regularly. It is not harmful and is a completely normal part of the ovulatory process.
When Should You See a Doctor?
Ovulation pain becomes a concern if:
- It is severe and lasts more than 2-3 days
- It comes with fever, vomiting, or unusual discharge
- The pain is accompanied by heavy mid-cycle bleeding
These symptoms can indicate conditions like ovarian cysts, endometriosis, or appendicitis, which require medical evaluation.
How to Use Ovulation Pain as a Fertility Signal
If you are trying to conceive, ovulation cramps are an incredibly useful natural signal. They tell you ovulation is happening right now - which is your peak fertility window.
Log your cramps in HerWell alongside your basal temperature and cycle data to build a complete picture of your ovulation patterns over time.
Track your cycle phases in real-time with HerWell. Download free on iOS and Android.