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Armband Size Guide

Upper arm circumference

How to Measure

  1. 1Wrap a flexible tape measure around your upper arm
  2. 2Measure at the fullest part (mid-bicep)
  3. 3Note in inches or centimeters

Size chart

Size Inches cm
Standard Armband 8.5″ – 15.5″ 21.5 – 39 cm
Extra-Long Armband 12.5″ – 18.5″ 31.5 – 47 cm
Both armbands fit most body types.
Additional bra extenders can be purchased at any store if larger sizing is required.

Fertility Q&A

What makes temperature a biomarker for tracking fertility?

Fertility symptoms

What makes temperature a biomarker for tracking fertility?

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What can I do if I don’t have any cervical mucus, or only very small amounts?

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What do I need to track cervical mucus?

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What is cervical mucus?

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Can I confirm ovulation by ovulation pain?

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Can I ovulate more than once per cycle?

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I usually get my period like clockwork - why am I late this cycle?

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Birth control

Can I use barriers while using fertility awareness?

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PREGNANCY

Pregnancy - Week 33

Your baby is about the size of a pineapple at week 33, and by week 34 baby will be the size of a cantaloupe. Your baby’s body is really getting ready for the outside world now! Their bones are hard...

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