Why there are quite few urine early pregnancy test kit for cow?

Unlike human, pregnant cows do not produce the hormone HCG, which makes it impossible to use a human urine early pregnancy test kit for cow testing.

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What does it mean if I get 2 lines near control line in pregnancy test after 10 minutes? - Quora

Why there are quite few urine early pregnancy test kit for cow?

A simple, inexpensive and portable on-farm test for pregnancy diagnosis and ovary status in cows via chemical analysis of urine - ScienceDirect

1 Imported High Quality---Pregnancy test paper for cows, with high accuracy, can quickly detect whether the cow is pregnant.Two red bands (zone C and

GLOGLOW Cow Pregnancy Test Paper, 10 Pcs Cow Pregnancy Test Paper Livestock Disposable Early Pregnant Detection Testing Tool Livestock Supplies