Conception rates for heifers are highest during which estrus?

Conception rates for heifers are typically highest during the third estrus. This is largely due to the physiological and developmental maturity of the heifers. During the first estrus, heifers may not be fully physiologically ready to conceive, as they are often still maturing. The second estrus may still see lower conception rates as the heifers continue to develop reproductive readiness. By the time they reach their third estrus, they have usually achieved a better balance of hormones and physical maturity necessary for successful conception. Therefore, the third estrus is often characterized by improved fertility and higher conception rates in heifers, as their reproductive systems are more prepared for breeding at this stage.