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.

Pregnancy Detection Kits Market Share – Trends Report, 2032

Pee is for Pregnant: The history and science of urine-based pregnancy tests - Science in the News

How to Tell if a Cow or Heifer Has Been Bred: 6 Steps

Is My Dog Pregnant?

IDEXX Rapid Visual Pregnancy Test – Animal Health Express

Pregnancy test kit warning over false negatives - NZ Herald

Beef Cow-Calf Management Guide

Urine test strips for animals, Medi-Test Combi 10 VET, MACHEREY-NAGEL, MN

India's Hindus won't eat cows, but might drink their pee

Frontiers Urine Analysis has a Very Broad Prospect in the Future