06/16/2025 11:42 a.m.

Has the Pandemic Affected Your Menstrual Cycle?

Dr. Niels van de Roemer
Dr. Niels van de Roemer Medical Adviser

When Stress Disrupts the Menstrual Cycle

The COVID-19 pandemic turned our daily lives upside down. Remote work, lockdowns, health concerns, and completely new routines. During this time, many women wondered: Did the pandemic also affect my menstrual cycle?

A new study now provides clear evidence. Researchers analyzed more than 13,000 cycles from over 1,000 users of the Daysy fertility tracker. The results reveal a significant trend: Stress and lifestyle changes during the lockdown left a mark on the female cycle.

The Study at a Glance

  • Comparison period: 2019 vs. 2020
  • Number of cycles analyzed: 13,194
  • Participants: over 1,000 women

Key Results

  • Average cycle length in 2019: 29.8 days
  • Average cycle length in 2020: 28.7 days
  • Follicular phase shortened: from 17.1 days to 16.2 days
  • Menstrual bleeding: significantly longer during the first lockdown

In short: Cycles got shorter, while periods got longer.

What Women Reported:

Beyond raw cycle data, participants also answered a survey about their personal experiences:

  • 44.4% noticed changes in their cycle, basal body temperature, or menstruation during the past 12 months.
  • Among women who had COVID-19 themselves or had a family member infected, this rate rose to 53.9%.
  • 69% reported changes in their overall quality of life. 41% said it improved, while 46% felt it worsened.

Practical Tips if You Noticed Changes

If you’ve experienced cycle changes during the past few years, you’re not alone. Here are a few strategies to help you stay in tune with your body:

  • Track your cycle: With apps, basal body temperature tracking, or fertility monitors.
  • Manage stress: Yoga, meditation, journaling, or breathing exercises can help regulate hormones.
  • Maintain healthy routines: Prioritize consistent sleep, balanced nutrition, and regular movement.
  • Seek medical advice: If irregularities persist or bleeding becomes unusually heavy, consult your healthcare provider.

FAQs

Can stress delay or change my period?

Yes. Stress is one of the most common causes of cycle irregularities. It can make periods come earlier, later, or become more intense.

Why did my cycle get shorter during the pandemic?

Stress hormones can shorten the follicular phase, meaning ovulation happens earlier, resulting in a shorter overall cycle.

Should I be worried if my period changed during COVID?

Not necessarily. Temporary changes are normal in stressful times. However, if you notice consistent changes for several months, it’s best to seek medical advice.

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