Postpartum estrus occurs after birth in which species?

Postpartum estrus occurs after birth in which species?

• A. Rats, mice, and guinea pigs
• B. Dogs and cats
• C. Rabbits
• D. Ferrets

Answer: (A)

Postpartum estrus is the rapid return to the fertile phase right after giving birth. This pattern is seen in rats, mice, and guinea pigs, where hormonal changes after parturition trigger estrus quickly, allowing conception to occur soon after birth. This is why they’re the correct group for postpartum estrus. In contrast, dogs and cats typically have lactational suppression of the cycle for a period after birth and don’t resume estrus immediately postpartum. Rabbits and ferrets follow different reproductive patterns that aren’t described as postpartum estrus in the same way, so they don’t fit this scenario.

Postpartum estrus is the rapid return to the fertile phase right after giving birth. This pattern is seen in rats, mice, and guinea pigs, where hormonal changes after parturition trigger estrus quickly, allowing conception to occur soon after birth. This is why they’re the correct group for postpartum estrus. In contrast, dogs and cats typically have lactational suppression of the cycle for a period after birth and don’t resume estrus immediately postpartum. Rabbits and ferrets follow different reproductive patterns that aren’t described as postpartum estrus in the same way, so they don’t fit this scenario.