Home / Community / BBT Help & Chart Analysis

Opk vs BBT

Julia • Fri, Dec 25

I’m trying to figure out what day I ovulated. I got a positive opk on CD21, which would put ovulation on CD22 or CD23. If I’m reading my chart right, it looks like that says I ovulated on CD20. When did I ovulate?

Comment

You

Add Comment

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

See Our Editorial Standards

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors

Opk vs BBT

Let’s Glow

Glow is here for you on your path to pregnancy

25+ million

4.8 stars

20+

Getting Pregnant

Pregnancy

1st Year (Baby & You)

Baby Products