Sequential ovulation and fertility of polyoestrus in American black bears (Ursus americanus)

• Published in: Conservation physiology Vol. 2; no. 1; p. cou051
• Main Authors: Himelright, Brendan M., Moore, Jenna M., Gonzales, Ramona L., Mendoza, Alejandra V., Dye, Penny S., Schuett, Randall J., Durrant, Barbara S., Read, Betsy A., Spady, Thomas J.
• Format: Journal Article
• Language: English
• Published: England Oxford University Press 01.01.2014
• Subjects: superfetation; recurrent oestrus; pseudo-oestrus; embryonic diapause; Breeding; vulva score

In our study, we determined that each of 2-3 estruses (a.k.a. heat) that a female has during a mating season appears to be functional and fertile. Also, being pregnant does not prevent them from coming into heat again that same season. This ability may allow bears to maximize reproductive fitness.Ab...