What is the 'pregnancy line'?

Linea Nigra: Should I Be Worried?

Linea Nigra: Pregnancy Line - American Pregnancy Association

Pregnancy and Pigmentation Changes

How does one interpret faint lines on a pregnancy test

Faint positive home pregnancy test: What does it mean?

3 Reasons You're Getting a Faint Line on your Home Pregnancy Test – MamaSoup

When was your test line as dark or darker than control

What Is Evaporation Line Pregnancy Test And How It Looks Like Pregnancy test, Positive pregnancy test, Early pregnancy test

One faint line and one dark line on a pregnancy test, what does it indicate? - Quora

What Is the Dark Line on My Pregnant Belly?

What is the 'pregnancy line'?

Using Computer Vision to Classify Pregnancy Test Results, by Laura Langdon