What is the difference between doe urine and doe estrus?

Doe urine is a general deer scent used to simulate the presence of a female deer. Doe estrus, also called doe-in-rut or doe-in-heat scent, comes from a doe during her breeding cycle. Doe urine is commonly used throughout the hunting season, while doe estrus scents are especially popular during the rut when bucks are actively searching for receptive does.